The utility model is a novel overload protection electric wire connecting device comprising a main body, a clamping fastener arranged at the center of the main body, a rotating shaft connected with the main body, a box cover connected with the rotating shaft, a clamping member arranged at the center of the box cover, conductors arranged on two left and right ends of a protector, iron plates arranged above the conductors, screws connected with the iron plates, an insulating layer surrounding the conductors and the protector, a waterproof layer arranged outside the insulating layer, and iron members positioned at two ends of a fuse wire; wherein two left and right sides of the main body are provided with wire inlet openings, the protector is arranged in the main body, the protector comprises the fuse wire, the iron members arranged on the two ends of the protector are respectively placed on the left and right conductors, the novel overload protection electric wire connecting device can effectively prevent people from overload use of electric wires, and therefore hidden troubles of electricity utilization safety can be greatly reduced; rainwater penetration can be well prevented, and the possibility that electricity leaks from connection parts of the electric wires can be greatly prevented.