Tool for brushing and turning blade tops of power turbine blades and using method of tool

The invention relates to a tool for blue-fitting and turning a blade top of a power turbine blade and a use method of the tool, and aims to solve the problems that when a power turbine guide blade of a power turbine part sleeve of a certain gas turbine unit is subjected to blue-fitting of a process impeller, fixation at a blade root is loosened, the size of a blade top arc is deviated, and the yield is low. According to the technical scheme, a plurality of special-shaped supporting tables which are obliquely arranged from one side to the other side are arranged on the outer ring of the process impeller, the blade mortises are formed in the bottoms of the gaps between every two adjacent special-shaped supporting tables, the blade mortises are used for installing the blades, and the connecting assemblies for mortise radial tensioning are arranged at the bottoms of the blade mortises and used for abutting against the blades. The blade crown fixing block is used for positioning blade crowns of two adjacent blades