Sima Fu was the third among the eight sons of Sima Fang, who served as the Intendant of the Capital (京兆尹) during the reign of Emperor Ling towards the end of the Eastern Han dynasty ( 184–220).
Sima Fu was a member of the powerful Sima clan, who served as the Capital's Intendant (京兆尹) during the late Eastern Han Dynasty (184-220), and was the third son of Sima Fang.