The invention relates to the security field of the power equipment and discloses protection equipment of a power equipment ground circuit, except for a ground unit, the protection equipment further comprises a triggering unit and an auxiliary ground unit; the input end of the ground unit is connected with the side of the power equipment and simultaneously connected with the input end of the triggering unit and the input end of the auxiliary ground unit, and the output end of the triggering unit is connected with the triggering end of the auxiliary ground unit. When the ground unit is opened, triggering signals are transmitted to the auxiliary ground unit through the triggering unit to connect the ground unit, thereby reducing high voltage between the power equipment side and the ground and eliminating potential safety risks. Furthermore, the protection equipment has the advantages of simple structure, low apparatus cost and sensitive operating characteristics, so that the disadvantages of high cost and weak sensitivity can be quickly solved.