Listed companies are the backbone of the regional economic growth. The enterprise innovation capability is the ability of the enterprises to integrate the internal and external resources through multi-dimensional innovation activities to improve the enterprise performance and obtain the economic benefits in a short period. This paper constructs the evaluation index system and evaluation model of enterprise innovation ability from three perspectives: technological innovation ability, institutional innovation ability and management innovation ability, and uses the improved AHP method to determine the weight of each index. Based on the data of 30 listed companies in Gansu Province from 2016 to 2020, this paper measures their innovation efforts and suggests the ways to improve their innovation ability.