Who had written srimad bhagvat...?

Ved Vyasa (Krishna Dvaipayana) is traditionally credited as the author of the Srimad Bhagavatam, also known as the Bhagavata Purana. He compiled this ancient Hindu scripture that focuses on devotion to Lord Krishna, particularly through the stories of Krishna's life and teachings. Shukdeva was the narrator who recited it to King Parikshit, not the original author.