Abstract: In this paper, a ZK2000 gas turbine was taken as the study object. The solar thermal conversion module, split-body type recuperator and three-way valve were introduced to ZK2000 through modification, and a ZK2000 solar gas turbine was proposed to overcome the shortcomings of traditional solar thermal power generation and reduce fuel consumption. The performance of ZK2000 simple cycle, ZK2000 recuperative cycle and ZK2000 solar hybrid cycle were compared and calculated by commercial software NPSS. The Golmud of Qinghai Province was taken as an example to analyze the availability of ZK2000 solar gas turbine, and the influence law of three factors affecting the system performance: solar direct normal irradiance, solar receiver pressure loss and ambient conditions were analyzed, which can provide guidance for the application of ZK2000 solar gas turbine. On the basis of ZK2000 solar gas turbine, the cycle structure (adding ORC system) and operation mode (variable speed) of the system were optimized respectively with the fuel consumption rate as the optimization objective. The results show that the optimized system can obtain lower fuel consumption.