The utility model provides a tail accessory of an electric connector for outdoor cabling pressure welding. The tail accessory of the electric connector comprises a thread shell, a shielding ring, a sealing ring and a connecting pipe, the upper end of the thread shell is connected with a female seat joint of the electric connector, the lower end of the thread shell is provided with external threads, the inner side of a pipe wall at one end of the shielding ring is provided with internal threads matched with the external threads of the thread shell, the shielding ring and the sealing ring are fixedly connected and coat a cable sheath of a cable, the inner side of a pipe wall at one end of the connecting pipe is provided with internal threads matched with outer wall threads of the thread shell, the outside of the pipe wall at the other end of the connecting pipe is provided with external threads, one end of the shielding ring is connected with the connecting pipe, and the other end of the shielding ring is connected with the sealing ring. According to the tail accessory of the electric connector, the connecting pipe is additionally provided, the goal of lengthening the shielding ring is achieved, the connecting pipes with different lengths can be selected according to different requirements of pressure welding tools, 360-degree shielding for the pressure welding of the cable is realized, and the requirement of outdoor pressure welding cabling is met.