The heating roller is the key part of the roll press for continuous felt reinforced thermoplastic sheet, and its performance is directly related to the production quality of thermoplastic sheet and the running speed of the whole production line. The performance parameters of the heating roller mainly include structural strength, heating capacity and temperature uniformity of the roller surface. The heating roller circulates the heated hot oil to the flow channel of the heating roller, heats the roller surface, and transfers the heat to the composite sheet through the steel belt. Good flow channel arrangement and reasonable heat source supply are the guarantee of production efficiency and product quality of continuous felt reinforced thermoplastic sheet roller press.