Choudhury was associated with leftist politics and progressive cultural movements. In 1948, he attended the Communist Party Conference in Kolkata. He was elected Secretary of the
"Progoti Lekhok O Shilpi Songho" (Progressive Writers and Artists Association). In 1952, he was arrested under the Preventive Detention Act for protesting against police repression and the killing of students on the
Language Movement. In 1967, he protested the Pakistan government's ban on
Tagore songs on radio and television. In the early 1950s, there was a movement in Pakistan to replace the
Bengali language alphabet with the
Arabic alphabet. As a linguist and writer, Choudhury protested this move to undermine the native language of
East Pakistan. He actively participated in the non-co-operation movement during the early part of 1971 and renounced his award
Sitara-e-Imtiaz, awarded by the government of Pakistan in 1966. ==Literary works==