The invention discloses a preparation method of a carbon silicon doped PPS thermistor. The product prepared by the method provided by the invention has a polyphenylene sulfide composite material, hashigh electric conductivity and has stable resistivity in a high temperature and humid environment. The thermistor uses a carbon silicon material prepared by a special process as the conductive filler,while enhancing the conductivity of the thermistor, the carbon silicon material also has strong interaction with PPS mixed resin and non-conductive filler, the heat-conducting properties and mechanical properties of the carbon silicon material are brought into full play, and the service life of the thermistor is prolonged.