The League of Left-Wing Writers (Chinese: 中國左翼作家聯盟; pinyin: Zhōngguó Zuǒyì Zuòjiā Liánméng), commonly abbreviated as the Zuolian in Chinese, was founded in Shanghai on 2 March 1930 and subsequently established branches in Beijing, Tianjin, and Tokyo, Japan. Upon creation, the group had over 50 members, many of whom were also members of the Chinese Communist Party. The league eventually grew to have an estimated count of over 400 members. Due to danger from the Kuomintang party and the common threat of betrayal from within the league, the league kept no records of its membership and was structured in cells of four to five members. Within the cells, members were only allowed contact with their immediate supervisor.

Before the official inauguration of the league, a preparatory committee of twelve members was formed by the Cultural Committee of the Central Propaganda Section. The preparatory committee members included, Lu Xun, Rou Shi, Feng Xuefeng, Xia Yan, Jiang Guangci, Hong Lingfei, Zheng Boqi, Feng Naichao, Qian Xingcun, and probably Dai Pingwan and Pang Keng. All members of this committee were members of the Chinese Communist Party, with the exception of Lu Xun.

The preparatory committee deemed the following four kinds of behavior unacceptable:

In addition to these unacceptable behaviors, the committee assigned three roles to writers:

The league's inauguration was held at the Chinese Arts University on March 2, 1930. Lu Xun delivered the opening address to the organizational meeting where he criticized the bourgeois writers of the Crescent Moon Society. Left-Wing Writers not only active in the literary field, but also played an important role in other cultural organizations.

After the establishment of the League of Left-Wing Writers in March 1930, the Cultural Committee successively established other left-wing cultural groups such as the Social Scientists Union, the Left-Wing Dramatists Union, the Left-Wing Journalists Union, and multiple film and music groups. All of these groups and unions were assimilated into a parent organization, the All-China Left-Wing Cultural Federation (Chinese: 中国左翼文化总同盟; pinyin: zhōngguó zuǒyì wénhuà zǒng tóngméng), which was established by the Cultural Committee in Shanghai in October 1930.

Due to the leagues strong affiliation with the CCP, it was quickly banned in September 1930 by the Kuomintang party, and arrests were issued for the league's members. On 7 February 1931, the Kuomintang party executed five members of the League: Li Weisen (Chinese: 李伟森; pinyin: Lǐwěisēn), Hu Yepin, Rou Shi, Yin Fu (Chinese: 殷夫; pinyin: Yīn fū), and Feng Keng in the "White Terror" period that followed the 1927 Shanghai massacre. Some have suggested that the five may have been betrayed by others in the Communist Party, perhaps as a result of a power struggle.

The League was disbanded voluntarily in 1936. This was mainly in order to encourage authors to unite across political boundaries and face the rapidly increasing threat from Japan.