Islamic socialism in H.O.S Tjokroaminoto's view is a concept that combines the principles of socialism with Islamic values in an effort to fight imperialism. This concept aims to achieve social justice and counter the exploitation carried out by imperialism. In H.O.S Tjokroaminoto's view, imperialism is contrary to the teachings of Islam which advocate social justice and equality. Islamic socialism emphasizes the importance of solidarity between Muslims and the Indonesian nation in resisting imperialism, as well as strengthening the Indonesian nationalist movement in fighting for independence and social justice. The implementation of Islamic Socialism includes wealth redistribution, equitable access to resources, protection of labor rights, and economic development oriented towards social welfare. However, the implementation of this concept may vary depending on the context and interpretation carried out by the individual or group to which it adheres. Islamic socialism in the view of H.O.S Tjokroaminoto provides alternative thinking in the face of imperialism and influences the Islamic socialism movement in Indonesia.