He is particularly noted for his realistic and socialistic films such as Do Bigha Zamin, Parineeta, Biraj Bahu, Devdas, Madhumati, Sujata, Parakh and Bandini, making him an important director of Hindi cinema.
Inspired by Italian neo-realistic cinema, he made Do Bigha Zamin after watching Vittorio De Sica's Bicycle Thieves (1948).
Bimal Roy moved to Calcutta and entered the field of cinema as a camera assistant with New Theatres Pvt.
He collaborated on Anjangarh (1948), one of the last major films of the New Theatres, however, the Kolkata-based film industry was now on the decline, thus Roy shifted his base to Bombay (now Mumbai), along with his team in 1950, which included Hrishikesh Mukherjee (editor), Nabendu Ghosh (screenwriter), Asit Sen (assistant director), Kamal Bose (cinematographer) and later, Salil Chaudhury (music director), and by 1952 he had restarted the second phase of his career with Maa (1952), for Bombay Talkies.
The marriage collapsed within a few years, but resulted in the birth of a son, the actor and screenplay writer Aditya Bhattacharya.
[6] and his great-granddaughter Drisha Acharya married Karan Deol Bimal Roy has received several awards.
His films featured beautiful and memorable songs, rendered by all the top playback singers of the day.
Madhumati (1958), his first and only collaboration with Ritwik Ghatak (who wrote the screenplay), and one of the earliest films to deal with reincarnation.
In July 2014, Prince of Wales Museum, Mumbai hosted an exhibition; Bimal Roy: Life & Times, organised in collaboration with his children.