Heavy concrete aggregate screening device

A heavy concrete aggregate screening device comprises a screening box, multiple layers of screening rollers are arranged in the screening box, each screening roller is provided with a spiral protruding rib, the spiral protruding ribs on every two adjacent screening rollers are opposite in rotating direction, one end of a roller shaft of each screening roller penetrates out of one side of the screening box, and the other end of the roller shaft of each screening roller penetrates out of the other side of the screening box. A gear is arranged at one end of the roller shaft located outside the screening box body, the gears on every two adjacent screening rollers are meshed with each other, a driven chain wheel is further arranged on the roller shaft of one screening roller in each layer of screening rollers, the multiple driven chain wheels on the multiple layers of screening rollers are in transmission connection through a transmission chain, and a first motor is arranged on the screening box body. A driving ch