The utility model discloses an use is at colliery split type oil tank among gallery drilling equipment in pit, it includes: main fuel tank and bellytank, the two is split type structure, and wherein, the main fuel tank sinks embeddedly in drilling equipment's car frame body to with car frame body fixed connection, the main fuel tank has oil absorption filter open, the position of bellytank is higher than the main fuel tank, sets up on drilling equipment's higher vehicle frame platform to with vehicle frame platform fixed connection, the bellytank has oil return filter open, the main fuel tank passes through the pipeline intercommunication with the bellytank, and the bellytank carries out the fluid compensation to the main fuel tank, and final fluid return circuit is got back to in the bellytank through oil return filter open. The utility model has the beneficial effects of: simple structure, safe and reliable, the rational utilization free space, arrange for the complete machine and has brought good space usability, fabulous compression, the whole space of having beautified, having simplified equipment, to the colliery in the pit gallery drilling equipment's structural arrangement provide more selectivity.