Purnima Banerjee was born in 1911.
Her participation in Indian independence movement include: Salt March, the Quit India Movement, organizing labourers' and kisan meetings, individual satyagraha. In 1946, she became a member of the Uttar Pradesh Legislative Assembly. She was a member of the Congress Socialist Party since its inception in 1934. She also served as the secretary for the Indian National Congress’ city committee in Allahabad. She conducted meetings with trade unions, kisans and strived to create rural engagement.
She was elected from United Provinces to the Constituent Assembly and was a part of the assembly between 1946 - 1949. In the Constituent Assembly she advocated for education, and “right of livelihood and right of earning honorable bread” to be a part of the fundamental rights. She made several interventions in the Constituent Assembly regarding preventive detention clause and composition of members of the upper house.
Purnima Banerjee died in 1951 while she was residing in Nainital.