In response to the problem that the newly purchased 37 high water filling brackets at 12216 high water filling working face of Xingdong Mine would no longer be used after 1 or 2 years, with huge waste, after repeated research and demonstration, it was decided to transform the original ZC5160/30/50 gangue filling bracket into a composite filling bracket. Practice showed that the modified composite filling bracket can realize both gangue filling and high water filling, which achieved the expected purpose and significant economic and social benefits.