The utility model discloses an insulating protection apparatus, including left hand cover body and right hand cover body, the leading flank inside and the trailing flank inside of left hand cover body all are provided with left metal mesh, the leading flank inside and the trailing flank inside of right hand cover body all are provided with right metal mesh, left side metal mesh and right metal mesh are through first wire electrically connected, first wire electrical connection has the second wire, the lower extreme of second wire is connected with the earthed pole, there is the bolt upper end one side of earthed pole through threaded connection, the bolt that the second wire passes through on the earthed pole links to each other with the earthed pole is fixed, the utility model discloses insulating effect can be effectively realized, and when the insulating layer damage, the safety of electric power maintainer can be guaranteed equally.