Ore crushing and screening equipment for mining

The invention relates to the field of ore crushing, in particular to ore crushing and screening equipment for mining, which comprises a crushing unit, a screening unit and a conveying unit, the screening unit comprises a screening box and a multi-stage screening plate obliquely erected in the screening box, a transmission mechanism is arranged on one side, facing the conveying unit, of the screening box, and the transmission mechanism comprises a rotating wheel and a concave sliding frame; the rotating wheels rotate on the side wall of the screen box, eccentric parts sliding in grooves of the concave sliding frames are arranged at the eccentric positions of the rotating wheels, and the sides, facing the screen plate, of the concave sliding frames are obliquely and rotationally connected with ejection mechanisms which are located on the bottom side of the screen plate and used for ejecting materials clamped in screen holes of the screen plate. The multiple ejection mechanisms are driven by the transmission mec