The belt conveyor conveys the river pebbles to the jaw crusher of pe-500x750 for crushing, and then the materials are screened on the 2yzs-1860 vibrating screen to screen out the 0-5mm raw sand. The materials greater than 5mm enter the conical crusher of cs160 for crushing, and the discharge is screened by a three-layer yzs-2160 vibrating screen, in which the materials less than 30mm enter the sand making machine for sand making production, Materials larger than 30mm are returned to the conical crusher to continue crushing. The discharge and the sand making machine are sieved on three layers of yzs-2160 vibrating screen. After the finished products of 0-5mm and 5-8mm are washed by the sand washing machine xsd3016, they are transported to the corresponding finished product area by the finished product conveyor belt for stacking.