The invention provides a pipe fitting protruding point forming device which comprises a bottom die and a clamping die. The bottom die is used for enabling a pipe fitting to be inserted in and enabling protruding points to be stamped. The clamping die is provided with a placing cavity which is used for being matched with the pipe fitting, and a demising groove which allows the protruding points to be molded is formed in the side wall of the placing cavity. According to the pipe fitting protruding point forming device, the clamping die is additionally arranged, the pipe fitting is placed in the placing cavity of the clamping die, and the demising groove which is formed in the side wall of the placing cavity provides existing space for the protruding points of the pipe fitting. In the stamping process of the protruding points on the bottom die, the side wall of the placing cavity restrains the pipe fitting, thus, the pipe orifice deformation of the pipe fitting can be reduced, the pipe fitting can be normally assembled, a straightening process is of no need, and further the production efficiency of the pipe fitting with the protruding points is improved. Meanwhile, the demising groove can have a limiting effect on the protruding points on the pipe fitting, the uniformity of the protruding points of the pipe fitting is improved, and therefore the quality of the entire pipe fitting is improved.