The invention relates to the technical field of composite extrusion, in particular to a plastics extruder capable of adjusting a shoe sole. The plastics extruder comprises a shoe sole extruder main body and an adjustable display screen, wherein one side of the shoe sole extruder main body is provided with a discharging pipe, a Number-one shoe sole molding die is arranged inside the shoe sole extruder main body, the outer surface of the Number-one shoe sole molding die is provided with a shoe sole adjusting apparatus, one side of the Number-one shoe sole molding die is provided with a Number-two shoe sole molding die, and the inner surface of the discharging pipe is provided with a cooling apparatus. The plastics extruder capable of adjusting the shoe sole is provided with the Number-two shoe sole molding die, the cooling apparatus, a dust collector and the shoe sole adjusting apparatus, so that the production efficiency can be increased, the enterprise expenditure can be saved, the cooling can also be performed, the overheat of the shoe sole can be avoided, the deformation of the shoe sole caused by the touch of the working personnel is avoided, smoke and dust inside the extruder can be absorbed, the attractiveness of the shoe sole can be improved, the adjustment can be performed according to the size of the shoe sole, the use is convenient, the plastics extruder is suitable for different working conditions, and the application prospect is better.