The invention discloses a high-precision full-automatic punching and cutting machine for a flexible printed circuit. The punching and cutting machine structurally comprises a control box, power lines,a punching and cutting head, a top fixing plate, a lower pressing plate, connecting columns, a garbage clearing mechanism, a box body, power switches, a box door and universal wheels; the garbage clearing mechanism is installed at the top end of the box body, and is composed of a starting device, a rotating device, a feeding device, a rolling device, an elastic device, a sliding device, an auxiliary device, a storage tank device, a valve device and a conveying belt; and the rotating device is arranged at the top end of the starting device, the rotating device and the starting device are in clearance fit, the feeding device is arranged at the top end of the rotating device, the feeding device and the rotating device are in clearance fit, and the right side of the feeding device is providedwith the elastic device. According to the machine, garbage clearing can be carried out on the interior of the machine, manual starting is not needed, automatic clearing can be carried out when the garbage material reaches a certain amount, so that the time of using personnel is saved, and the working efficiency of the machine is also improved.