Biswas started in politics by becoming an independent MLA in 1972. He was elected as a Member of the Legislative Assembly in Tripura, defeating the Indian National Congress MLA in the elections of 1977. Biswas gradually moved to national politics and was elected as a member of the Indian Parliament's 7th and 8th Lok Sabha from 1980 - 1989. Biswas was a trade union activist in Tripura and founded several trade unions there, including the Tripura Employees Coordination Committee, and the Tripura branches of the AITUC, and the DYFI. He also held important positions in several workers' unions in the state. After the split of the Communist Party of India and CPI in 1964, the CPI-M came to be known as the party of the tribals in the state of Tripura. Until the early 1970s CPI was not popular in the Bengali community of the state. Biswas played an important role in building the party organisation among the Bengalis of Tripura. With this mass movement, he was able to help defeat the locally strong Indian National Congress in the elections of 1977. This played a pivotal role in bringing the CPI-M to power in 1978. During the 8thLok Sabha, he took part in a debate on 31 August 1987 with the then Defence Minister K. C. Pant, in what became known in the national press as the "Bofors debate". Biswas was a trade unionleader and social worker, and several trade and workers' unions in the state were formed under his leadership. He was arrested in connection with political activities in 1966, 1969, 1971 and 1977.
In late 1980s Biswas became vocal against then Tripura's Chef Minister and CPI president Nripen Chakraborty's style of leadership. The ideological objection was regarding Chakraborty's way of governance and non-compliance with section 112 of CPI working principle, which emphasizes "more power to people" rather than government. This ideological difference widened and attracted a central stage of CPI national and politbureau meetings, eventually leading Biswas to quit the party and form Janganotantrik Morcha. A number of supporters of Biswas' ideology also followed him, including the Tripura Employees coordination committee, originally founded by Biswas in 1968. TECC comprises 13 unions, with TGTA and TTA being the largest. As a result of this split Biswas retained the TECC unions. This eventually led to the loss of CPI in the elections of 1988 Biswas continues to campaign for the Tripura employees’ demands and welfare.
