Abstract: The hidden sinkhole within a mining block of a coal mine would be the main channel of the mine water disaster and would be a serious threatener to the min e safety production. In order to find out the development scope and watery of the hidden sinkhole within the coal mining face,according to the geophysics features of the mi ne,the integrated geophysical technology of the Mine Transient Electromagnetic Method and Mine DC Electrical Method was applied to draw the cross section picture of th e apparent resistivity and the deep slicing picture of the resistivity. The electric property distribution features were applied to detect development location and scope of the sinkhole.The analysis showed that transient electro magnetic apparent resistivity in abnormal area was less than 3 2. m,the resistivity in relevant scope of DC Electrical Me thod was less than 6 Q:m,a low resistance reaction would be obvious in the abnormal area and the electric power line would be in a closed status and high watery. The cas es showed that the application of the mine transient electromagnetic method and the mine DC electrical method could be effectively and jointly detect development scope a nd watery of the sinkhole and could be verified. The integrated geophysical technology would be development orientation to solve further geological problems.