Sampling valve

The invention relates to a sampling valve, and relates to the technical field of sampling valves, the sampling valve comprises a valve body, a sampling tube, a valve rod and a valve block, the valve rod vertically penetrates through the valve body in a sliding mode, a supporting frame is arranged on the valve body, the supporting frame is sleeved with a supporting cap in a threaded mode, and the supporting cap can vertically move; and the upper end part of the valve rod is rotationally connected with the supporting cap. According to the sampling valve, the valve rod which is vertically and slidably connected with the valve body is arranged, and when the supporting cap is rotated, the supporting cap can drive the valve rod to vertically move, so that the risk of relative rotation of the valve rod and the sealing filler is reduced, the shearing force of the valve rod to the sealing filler is weakened, the risk of abrasion of the sealing filler is reduced, and the sealing stability of the sampling valve is impro