The invention relates to a thermoplastic composite material for hollow building templates and a manufacture method thereof and application thereof. By weight, 20-55 parts of polypropylene, 30-50 parts of glass fiber, 5-10 parts of inorganic filler, 5-10 parts of flexibilizer, 5-10 parts of compatilizer, 0.1-0.5 part of coupling agents, 0.1-0.3 part of antioxidant and 0.2-0.3 part of light stabilizing agents are mixed for 3-5 minutes in a high-speed mixer, and extruded from a double-screw extruder to form the thermoplastic composite material. The thermoplastic composite material is smelted, extrude-molded, vacuum-cooling-molded, primarily dragged, heated to eliminate stress, secondarily dragged and cut into the hollow building templates meeting requirements. Compared with the prior art, the thermoplastic composite material has the advantages of being high in strength, roughness and size stability, and the like.