Method for friction test of hydraulic control switch machine

The invention belongs to a friction test method for a hydraulic control switch machine, which comprises a hydraulic cylinder (2) and a hydraulic friction function valve block group, the hydraulic friction function valve block group consists of an oil way transition plate (4) and a two-way normally-open bidirectional cut-off cartridge valve (5), and the friction test method is characterized in that the hydraulic friction function valve block group is connected between the hydraulic cylinder (2) and a hydraulic main oil way system (6); an oil path channel interface (8) of the hydraulic friction function valve block group is matched with oil ports of the hydraulic cylinder (2) and the hydraulic main oil path system (6); when the to-be-tested switch machine is installed in place on the test bench, the hydraulic piston rod of the hydraulic cylinder (2) is connected with the action rod of the switch machine through a connector, and the friction test and the characteristic test of the switch machine are completed. T