The invention provides a power system cable wear-resistant suspension type hanging and alarming device and belongs to the field of overhead line alarm sign boards. The power system cable wear-resistant suspension type hanging and alarming device comprises a sign board, a solid ball and a hollow ball, wherein the solid ball is a solid sphere and connected with the top of the sign board via a connection rod; the hollow ball top is fixed on a cable via a fixing device; the solid ball is placed in the hollow ball; the hollow ball is provided with an opening, through which the connection rod can pass, so no wear is caused to the cable and the cable can be prevented from swinging.