In this paper, we measures TFP of 89 China's Regional Banks by Malmquist- Luenberger productivity index. Based on this, we explore the effects of technological finance on Banks' TFP. The results show that: as a results of threshold effect, higher technological finance have a significant positive effect on Banks' TFP, lower technological finance have a negative effect on Banks' TFP. Technological finance have a significant positive effect on Banks' TFP in East Central China, but a negative effect in Western Central China. Strategic investor also influence the effect from technological finance to Banks' TFP. A bank is easier to enjoy the benefit from technological finance with the following characteristics: (1)Younger board member; (2)Less Monopolization; (3)Trans regional management; (4)Better innovation ability on business; (5)Better business diversification; (6)Better cost control capability. Suggestions are given according to the conclusions.