The invention discloses a valve block assembly of a hydraulic system of a comprehensive experiment platform. The valve block assembly is used for achieving integrated mounting of hydraulic valves of the hydraulic system. The hydraulic system comprise a main oil supply way and a hydraulic control loop connected with the main oil supply way through an overall pressure oil way. The main supply oil way comprises a main pump oil supply way and an oil filling pump oil supply way. The hydraulic control loop comprises a mobile workbench lifting hydraulic loop, a Z-direction hydraulic cylinder control loop, an X-direction hydraulic cylinder control loop and a Y-direction hydraulic cylinder control loop. The valve block assembly comprises a support and a valve block mounted on the support. A duct is reserved in the valve block on the basis of the hydraulic system of the comprehensive experiment platform. The overall pressure oil way, a master oil return way and a master oil discharge way are arranged in the valve block. By arranging the duct in the valve block on the basis of the hydraulic system of the comprehensive experiment platform, integrated mounting of hydraulic valves of the hydraulic system is achieved, pipeline connection is reduced, and operational stability of the hydraulic system is improved.