The invention discloses a debris flow moving and accumulating process simulation experiment system. The debris flow motion and accumulation process simulation experiment system comprises a conveyor belt, elevators, a stirring box, a work platform, a water tank, a connection groove, straight circulation grooves, a bent circulation groove, a circulation groove valve, hole pressure testing devices, a bayonet, a flow-speed and flow testing device, an impact force testing device, a high-speed camera, an accumulation area, a column base, a water drawing device and a receiving host. Solid particles with certain granularity compositions are prepared into a debris fluid with a certain slurry concentration by the conveyor belt, the elevators, the stirring box, the work platform, the water tank and the water drawing device, and the column base is used for ensuring the stability of the work platform. The circulation groove valve is used for controlling the debris fluid to move in the straight circulation grooves or the bent circulation groove. The elevators are used for controlling the moving gradient of the debris flow. Moving and accumulating processes and dynamics parameters of the debris flow are tested and monitored by the hole pressure testing devices, the flow-speed and flow testing device, the impact force testing device and the high-speed camera.