The present invention provides a self-enhancement plastic profile and a production method thereof. The self-enhancement plastic profile is made by co-extrusion a substrate resin and a PBT resin containing fiber glass. The production method of the self-enhancement plastic profile is that: melting and co-extrusion of the substrate resin and the PBT resin containing fiber glass. Infrastructures comprise a main engine and an auxiliary engine vertically arranged to the main engine. The main engine processes the PVC substrate (1), the auxiliary engine processes an enhancement bar (2) of the PBT resin containing fiberglass, the raw materials are extruded by the main engine and the auxiliary engine at the same and the extrudate is pre-profiled, and subjected to cold cutting and sized. The enhancement bar (2) is made by blending the fiberglass with the polybutylene terephthalate (PBT) plastic. The self-enhancement plastic profile has advantages of simple, convenient and quick installation and convenient to produce.