The invention discloses a waste treatment device for aluminum plate machining, and relates to the technical field of aluminum material machining. The waste treatment device for the aluminum plate machining comprises a crushing box and a belt type conveying device, wherein a discharging bin is integrally formed at the bottom of the crushing box, and a feeding bin is inserted in the top of the crushing box in a penetrating mode. According to the waste treatment device for the aluminum plate machining, through the crushing box, a mounting frame, a material limiting plate, the feeding bin, a crushing device, a heat dissipation fan blade, a first mesh plate, a second mesh plate, a first motor and a cushion block are used in cooperation, external air can be guided to the crushing device, air blowing and heat dissipation can be conducted on the crushing device, the temperature of the crushing device can be reduced, the first mesh plate can also uniformly guide air to the crushing device, thecontact uniformity of air and the crushing device is facilitated to be improved, the heat dissipation effect on the crushing device is facilitated to be improved, the crushing device can be rapidly cooled, and the heat of an upper crushing roller of the crushing device can be taken away.