PVC wall panel is a kind of PVC product that has risen rapidly in recent years. The products quickly win customers' love with the advantages of environmental protection, beauty, moisture resistance and convenient installation. In the process of pvc wallboard extrusion, the common abnormal conditions are: wall panel is not straight, wall panel is uneven, surface is not smooth, density is high, wave pattern, toughness is not good, etc. How should we encounter these problems? Solve it?