The utility model provides a colliery is directional rig in gallery in pit, including drill carriage and pump truck, the drill carriage mainly includes automobile body, fixture, oil tank, joins in marriage the oil jacket, fixture includes preceding clamping part and back clamping part, preceding clamping part sets gradually with the back clamping part and puts up in feeding of drill carriage, it includes cylinder and piston to join in marriage the oil jacket, be two oil circuit rotary seal formula structures between piston and the cylinder. The utility model has the characteristics of the structure is simple and convenient, the space is compact, safe and reliable etc.