Electrical insulation thermoplastic resin composition as well as preparation method and application thereof

The invention provides an electrical insulation thermoplastic resin composition and a preparation method and an application thereof. The electrical insulation thermoplastic resin composition comprisesthe following raw materials in parts by weight: 40-70 parts of polyimide; 10 to 40 parts of polyphenylene sulfide; 15 to 40 parts of silica powder and 0.45 to 1.2 parts of a coupling agent. Accordingto the electrical insulation thermoplastic resin composition provided by the invention, polyimide is adopted; polyphenylene sulfide, the silica powder and the coupling agent are used as raw materials; according to the present invention, the raw materials are reasonably matched, and the use amounts of the raw materials are limited, such that the electrical insulation thermoplastic resin composition has advantages of excellent mechanical property, excellent electrical insulation property, excellent flame retardant property, excellent heat resistance, low thermal expansion coefficient and excellent comprehensive performa