Mandibular protraction amount measuring device and mandibular minimum protraction amount measuring method

The invention discloses a mandibular protraction amount measuring device and a mandibular minimum protraction amount measuring method. The mandibular protraction displacement measuring device comprises a handle part, an occlusion part and a limiting and blocking part, wherein the handle part is connected with the occlusion part; the limiting and blocking part is arranged between the handle part and the occlusion part and is vertically arranged at the upper end of the occlusion part; an upper anterior tooth placing space is formed by clamping the limiting and blocking part and the upper surface of the occlusion part; a scale identification part is arranged at the lower end of the occlusion part and is arranged along the direction from one end, far away from the handle part, of the occlusion part to the limiting and blocking part. The device is simple in structure and convenient to use, a solid supporting structure is provided for a patient, and the diagnosis experience of doctors and patients can be improved.