The Center of Assembly,Integration and Test of CAST made an important technical breakthrough on high-temperature and high heat flux simulation technology recently.The test specimen was heated up to 1850℃by a simulation system developed by the center inside a container simulating the vacuum,cold and dark space environment.Ultra-high-temperature test on the ground is required by spacecraft and relevant parts to simulate the space en- The Center of Assembly, Integration and Test of CAST made an important technical breakthrough on high-temperature and high heat flux simulation technology. The test specimen was heated up to 1850 ° C by a simulation system developed by the center inside a container simulating the vacuum , cold and dark space environment. Ultra-high-temperature test on the ground is required by spacecraft and relevant parts to simulate the space en-