The government of the People's Republic of China is based on a system of people's congress within the parameters of a unitary communist state, in which the ruling Chinese Communist Party (CCP) enacts its policies through people's congresses. This system is based on the principle of unified state power, in which the legislature, the National People's Congress (NPC), is constitutionally enshrined as "the highest state organ of power." As China's political system has no separation of powers, there is only one branch of government which is represented by the legislature. The CCP through the NPC enacts unified leadership, which requires that all state organs, from the Supreme People's Court to the State Council of China, are elected by, answerable to, and have no separate powers than those granted to them by the NPC. By law, all elections at all levels must adhere to the leadership of the CCP. The CCP controls appointments in all state bodies through a two-thirds majority in the NPC. The remaining seats are held by nominally independent delegates and eight minor political parties, which are non-oppositional and support the CCP. All government bodies and state-owned enterprises have internal CCP committees that lead the decision-making in these institutions.

The NPC meets annually for about two weeks in March to review and approve major new policy directions, and in between those sessions, delegates its powers to the working legislature, the NPC Standing Committee (NPCSC). This organ adopts most national legislation, interprets the constitution and laws, and conducts constitutional reviews, and is headed by the chairman, one of China's top officials. The president is a ceremonial office and has no real power but represents China abroad, though since the 1990s, the presidency has always been held by the leader of the Chinese Communist Party. Elected separately by the NPC, the vice president has no power other than what the president bestowed on them but assists the president. The head of the State Council, the NPC's executive organ, is the premier. The General Secretary of the Chinese Communist Party is China's leading official since the CCP is tasked with formulating and setting national policy which the state, after being adopted by the NPC or relevant state organ, is responsible for implementing.

The State Council, also referred to as the Central People's Government, consists of, besides the Premier, a variable number of vice premiers, five state councilors (protocol equal of vice premiers but with narrower portfolios), the secretary-general, and 26 ministers and other cabinet-level department heads. It consists of ministries and agencies with specific portfolios. The State Council presents most initiatives to the NPCSC for consideration after previous endorsement by the CCP's Politburo Standing Committee.

China's judicial organs are political organs that perform prosecutorial and court functions. Because of their political nature, China does not have judicial independence. China's courts are supervised by the Supreme People's Court (SPC), which answers to the NPC. The Supreme People's Procuratorate (SPP) is responsible for prosecutions and supervises procuracies at the provincial, prefecture, and county levels. At the same administrative ranking as the SPC and SPP, the National Supervisory Commission (NSC) was established in 2018 to investigate corruption within the CCP and state organs. All courts and their personnel are subject to the effective control of the CCP's Central Political and Legal Affairs Commission.

The CCP constitution states that the party is the highest force for political leadership. The party's institutions overlap with government institutions and the party has authority over government decisions at both the local and central levels. Senior government officials throughout the country are appointed by the CCP, and are mostly CCP members. All government departments, state-owned enterprises and public institutes include CCP committees, from the village level to the national level. The CCP committees in government bodies supervise and lead the bodies, with the State Council legally required to implement CCP policies. As outlined by the CCP constitution: "Government, the military, society and schools, north, south, east and west – the party leads them all."

Under the leadership of Deng Xiaoping, there were proposals to increase the separation of the state and the party, especially advocated by more liberal officials such as Zhao Ziyang. The proposals included abolishing CCP committees from some government departments, increasing the influence of the State Council, and having professional managers leader SOEs instead of CCP committees. These proposals were abandoned after the 1989 Tiananmen Square protests and massacre.

On the relationship between the government and the CCP, James Palmer, writing for Foreign Policy, states that, "[t]he Chinese government is essentially the shadow of the Communist Party, moving as the party does, and consequently government roles matter far less than party ones." According to The Economist, "[e]specially when meeting foreigners, officials may present name cards bearing government titles but stay quiet about party positions which may or may not outrank their state jobs." According to scholar Rush Doshi, "[t]he Party sits above the state, runs parallel to the state, and is enmeshed in every level of the state."

The integration of the CCP and the state has accelerated under Xi Jinping's general secretaryship, chairing eight party commissions that direct government bodies. Under Xi, several government and party bodies have also merged, with one party organization having an external state government name under the one institution with two names system, further integrating party and the state.