The invention relates to a mining lamp, in particular to a height-adjustable water cooling type LED mining lamp. The height-adjustable water cooling type LED mining lamp comprises a high-power LED lamp body installed at the bottom of a radiating body and a light reflection bowl; a driving power source of the high-power LED lamp body is connected with an external wire penetrating out of the radiating body; the radiating body is in a cylinder shape, at least three through holes are formed in the upper portion of the radiating body in the transverse direction, the at least three through holes are internally provided with water passing metal pipes matched with the inner diameter of the through holes, and pipe connectors are in threaded connection to two ports of each water passing metal pipe; a connecting cover is arranged at the top of the radiating body, the inner diameter of the connecting cover is matched with the outer diameter of the top of the radiating body, and the connecting cover is in threaded connection with the radiating body; and a positioning installation through hole is formed in a top plate of the connecting cover. The height-adjustable water cooling type LED mining lamp has the beneficial effects that the installing cost is reduced, the service life is prolonged, and the using cost is reduced.