From 1964 China started to develop hydraulic support, the deadline in 1973 and has worked for the Kailuan, Fu Yang, Tatung, Xuzhou, Huaibei, Tatun, Benxi, Tongchuan, Hebi, in Beijing and other cities for a series of prototypes and the entire face of experiments and observations. Coal based on the occurrence, Datong mine currently has TZ - I-Crib shift from the stent to TZ-VI-Crib shift from the self-shifting stent; Yangquan Coal Mine will not only BZZ - Crib since shifting supports the development of the A-type C, and developed a shield and cover for supporting self-shifting stent. Kailuan in Yima and test the shield, in Huaibei and Tatun tested shield support was gratifying results.