Feeding device of underground lateral trenching and milling device

The invention relates to underground construction equipment, in particular to a movable feeding device of an underground lateral trenching and milling device. The feeding device of the underground lateral trenching and milling device is used for feeding the lateral trenching device to certain depth. The lateral trenching device mainly comprises a guide frame, a milling device arranged on the guide frame and an adjusting valve. The device is characterized in that: the device mainly comprises a feeding cylinder, the upper end of the feeding cylinder is provided with a footstock connected with asteel cable, and the lower end of a piston rod is provided with a lug fixed on the guide frame. The device has the advantages of simple structure, can accurately feed the underground lateral trenching device to certain height so as to finish the trenching work.