Deep sea drilling is often accompanied by high temperature and high pressure， which puts forward new requirements for plugging materials for drilling. The HTD-3 high temperature plugging material was produced through the high temperature resistance screening of granular， fibrous and flaky leakage plugging materials. Then， the DL-3A high temperature plugging evaluation instrument was used to test the temperature resistance， pressure bearing and plugging performance of the plugging material. SEM was used to observe and analyze the bridging condition of the plugging material. Finally， the compatibility test was carried out at 5% gradient concentration. The results show that the HTD-3 high-temperature plugging material has some impact on drilling fluid density， but has little impact on other basic properties of drilling fluid. In this material， granular materials with different sizes completed bridging， fibrous and flaky materials completed filling， forming a high-strength plugging wall. HTD-3 high-temperature plugging material not only has a good temperature bearing and pressure bearing capacity， but also has a good sealing performance with plugging effect. The development of HTD-3 high temperature plugging material provides a feasible choice for deep-sea drilling plugging in the future.