Device convenient to plastics are broken

The utility model discloses a device convenient to plastics are broken, including shell, a cutting shaft, the 2nd cutting shaft, fixed axle, first cutter, second cutter and third cutter, a cutting shaft, the 2nd cutting shaft and fixed axle are all established inside the shell, first cutter, second cutter and third cutter all have a plurality of, and the first cutter of a plurality of, second cutter and third cutter correspond the equipartition respectively on the axial plane of a cutting shaft, the 2nd cutting shaft and fixed axle, first cutter and second cutter all include trapezoidal support portion, rectangle portion, first cutting part and second cutting part, and should go to the bottom and a cutting shaft is connected, one of them minor face in rectangle portion is established to first cutting part, the top in rectangle portion is established to the second cutting part. Compared with the prior art, the utility model discloses can be effectual fix waste plastic, increased effectively cutting rate of cut