Abstract: In view of the problem that strong rock burst has unclear impact on the developing height of water flowing fractured zone under fully mechanized caving mining, taking Hujiahe Coal Mine, which is a typical rock burst coal mine, as the research object, the measurement methods including simple hydrographic observation (drilling fluid consumption, water level observation), borehole color TV peep were used to monitor the height of water flowing fractured zone under fully mechanized caving mining. Based on the numerical simulation method, rule of overburden failure of the coal mine roof under rock burst was obtained. The rule of overburden failure of the coal mine which has similar mining conditions was compared, the difference of the development height in water flowing fractured zone in the roof of the coal mine between rock burst coal mine and conventional one was analyzed. It can provide basis for both water disaster of strong pressure coal mine and joint prevention and control of mineral pressure.