Gravel sorting device for civil engineering

The utility model discloses a gravel sorting device for civil engineering, which comprises a support frame, a rotatable roller is arranged on the support frame, the roller comprises a plurality of inner cylinders and outer cylinders, sieve pores are arranged on the surfaces of the inner cylinders and the outer cylinders, a plurality of clamping grooves are arranged on the outer cylinders, and clamping pieces are hinged in the clamping grooves; a support is arranged on one side of the upper end of the supporting frame, rolling wheels are rotatably installed on the two sides of the top of the support, a rolling groove is formed in the outer side face of one end of the outer barrel, and the rolling wheels roll in the rolling groove; the multiple inner barrels are sequentially arranged in the outer barrel, the inner barrels are rotationally installed in the outer barrel, clamping teeth are arranged at the positions, opposite to the clamping grooves, of the multiple inner barrels, and the inner barrels are connect