A member of Trinamool Congress, he also served as cabinet minister during First Banerjee Ministry.
[3] He contested as an independent candidate in 2016 elections to retain his Rejinagar seat from his predecessor Rabiul Chowdhury but lost.
He joined Bharatiya Janata Party in 2018 and contested from Murshidabad seat during 2019 Indian general elections but lost to TMC.
[4][5] After completing six years of expulsion, he rejoined TMC and won as MLA from Bharatpur seat.
[6][7] While campaigning for the 2024 Indian general election, Trinamool Congress legislator Humayun Kabir stated that he will toss hindus into the Bhagirathi River, a branch of the Ganges in West Bengal, in a span of two hours after winning, as Muslims constitute 70% of the population of Murshidabad.