The invention relates to a tap clamp device which comprises a tap body. An annular groove is formed in the upper end of the tap body. A limit retaining block is clamped at each of the upper and lower end of the annular groove. A fixing ferrule is fixedly welded to the top end of the tap body. A wear-resistant sleeve sleeves the annular groove between the limit retaining blocks. A slide groove formed along the axial direction of the tap body is formed in the lateral wall of the wear-resistant sleeve. An annular slider ring is disposed in the slide groove. The tap clamp device is simple in structure, reasonable in design and stable and reliable in overall structure, double clamping is used, fixing positions and tightness can be adjusted by the annular slider ring so as to facilitate demounting, and tap stability during machining can be guaranteed.