A method for preparing high-temperature anti-oxidation TiCp/Ti alloy based composite material relates to a method for preparing high-temperature anti-oxidation Ti alloy based composite material. The invention settles the problems of inferior high-temperature anti-oxidation, easy oxidation in high-temperature environment, easy generation of oxidizing layer breaking-off, and the caused remarkable-reduced dimension of titanium alloy and remarkable-reduced mechanical property in prior titanium alloy. The invention also settles the defects of unremarkable increase effect of high-temperature anti-oxidation performance, low using temperature and short high-temperature service time in the titanium alloy based composite material with uniformly-distributed TiCp and TiBw. The method comprises the following steps: ball-milling the C powder and Ti alloy power, mixing the powders, and then vacuum sintering. The TiCp/Ti alloy based composite material prepared according to the method of the inventiongreatly increases the high-temperature anti-oxidization ability of composite material on the base of increasing the mechanical property of TiCp/Ti alloy. When the high-temperature anti-oxidation TiCp/Ti alloy based composite material according to the invention is oxidized for 150h in the environment of 700 DEG C, only the surface titanium alloy is oxidized, and no breaking-off of oxidizing layer is generated. Therefore the high-temperature anti-oxidation TiCp/Ti alloy based composite material according to the invention has an advantage of long high-temperature service time.