Plastic alloy as well as preparation method and application thereof

The invention aims at solving the problem in the prior art that shock resistance of POM is poorer, provides a plastic alloy as well as a preparation method and application thereof and belongs to the technical field of modified plastics. The plastic alloy is formed by carrying out melting extrusion on four components and carrying out grafting reaction, and the four components are as follows in percentage by weight: 22-28% of PC, 7-10% of POM, 57-63% of ABS and 8-10% of CPE. The plastic alloy provided by the invention has the advantages that three materials, namely PC, ABS and POM, are subjected to the grafting reaction under the action of a compatibilizer CPE, a new macromolecular plastic alloy material is generated, and the strength, the shock resistance, the wear resistance and the temperature resistance of the newly generated macromolecular plastic alloy material are better than those of a single polyformaldehyde material respectively. The preparation method of the plastic alloy is simple, and a mixture is