 In next three years of imprisonment he became influenced in Marxism by the communist leaders like Bhabani Sen, Pramatha Bhaumik and Abdur Rezzak Khan.Soon after the release he became a member of Communist Party of India and started work as a peasant organiser.Chattopadhyay constructed the Shovana dam over the Shakhabahi river and Nabeki dam organising thousands of farmers in front of the goons of landlords and police forces.