Disclosed is a method for reducing height of a stamping deformation connection point. A shaping mold is used for pressing the connection point on a mechanical pressure machine, the shaping mold is of an ordinary stamp die set structure, and a working unit comprises an upper shaping die and a lower shaping die. The working portion of the upper shaping die is a cylinder, a ring-shaped groove with a semi-circular section is arranged at the bottom of the working portion of the upper shaping die, and the position of the ring-shaped groove is fit with the position of a ring-shaped convex edge at an outer edge on one convex side of the plate connection convex point; the working portion of the lower shaping die is a cylinder, a taper boss is arranged at the top end of the cylinder, the external appearance of the taper boss is fit with the external appearance of an inner hole on one concaved side of the connection convex point, and the height of the taper convex boss is smaller than the depth of the inner hole. During compressing, the convex side of the connection convex point faces upwards and is placed on the lower shaping die, the taper boss of the lower shaping groove is inserted and positioned in the inner hole on the concave side of the connection convex point, and the upper shaping die moves downwards to compress the connection convex point to plastically deform the connection convex point and reduce height of the connection convex point. The method is simple in operation, high in efficiency, low in cost and simultaneously free from reducing connection combination strength.