P. Krishna Prasad is the finance secretary of All India Kisan Sabha (36 Canning Lane) and the former CPI(M) MLA from Sulthan Bathery.

[7][9] In 2006, P. Krishna Prasad defeated N. D. Appachan, the sitting MLA of Sulthan Bathery and won by a margin of 25,540 votes.

Varghese Vaidyar and P. Krishna Prasad respectively, Bathery constituency remains a confident hold of Indian National Congress.

P. Krishna Prasad is associated with All India Kisan Sabha (36 Canning Lane) and Bhumi Adhikar Andolan (BAA).

[10] He came out strongly against the violence of cow vigilante groups and argued that their actions badly affected the livelihood of small and marginal farmers.

[11] He was part of the two-day colloquium on "Corporate Concentration in Agriculture and Food", organized by Rosa Luxemburg Stiftung, Focus on Global South and Alternative Law Forum.

He is the chairman of the Wayanad-based Brahmagiri Development Society (BDS), a cooperative aiming to combat the agrarian crisis in Kerala by organising solidarity economy among peasants and workers.