In this paper, based on the 1: 50, 000 active fault mapping, the Holocene activity of faults in the Tianzhu basin and evolutionary process of the basin are discussed. The results show that the faults are very active in Holocene. There was an earthquake in 3980±50 a B.P.. Tianzhu basin is a typical pull-apart basin and its forming and evolution are closely related with the active faults.