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Since teenager Alimin was active on national movement. He was a member of Budi Utomo, Sarekat Islam, Insulinde, before he joined with PKI and eventually he became leader of the organization. He was also founder of Sarekat Buruh Pelabuhan (formerly called Sarekat Pegawai Pelabuhan dan Lautan).
In early 1926, as the leader of PKI Alimin went to Singapore to negotiate with Tan Malaka in order to prepare rebellion. But, before Alimin went home, the rebellion was break out on 12 November 1926. Alimin and Musso were arrested by British police.
- Utamakan Persatuan dan Dialog, 2002–2010 Situs TokohIndonesia, 2 October 2010. Diakses 2 February 2011