Concrete processing device and concrete processing method

The invention provides a concrete processing device and a concrete processing method. Aggregate with large particle size doped in concrete can be screened out, and the aggregate with large particle size is ground into fine aggregate. The method comprises the steps that 1, two first motors are started to drive a stirring box to move upwards, a filter plate assembly enters the stirring box, the concrete is poured into two feeding boxes, and the concrete falls onto two hollow arc-shaped filter plates; 2, the aggregate with large particle size is screened out by the hollow arc-shaped filter plates; 3, after a particle grinding mechanism is started, the screened aggregate is transferred to a particle conveying mechanism to be ground; 4, the staggered hole diameters of first filter holes and second filter holes are changed, aggregate with different particle sizes can be screened, the distance between the two grinding cylinders is changed, and the aggregate with different particle sizes is ground; and 5, after grind