Method for electric coal drill using electric hand drill bit by utilization of special-shaped drilling rod

The invention relates to a method for using an electric hand drill bit on an electric coal drill through an abnormal drill rod and belongs to the technical field of coal mine electromechanical equipment. The abnormal drill rod comprises an abnormal drill rod concentric integral piece formed by an electric coal drill rod tail (1), a transition member (2) and a straight shank drill spliced rod (3) or a straight shank threaded drill spliced rod (4); and the abnormal drill rod can connect the electric coal drill and the straight shank drill chuck or the straight shank threaded drill chuck of the electric hand drill. The abnormal drill rod is characterized in that when the electric coal drill uses the abnormal drill rod, the top of the electric coal drill is connected with the straight shank drill chuck or the straight shank threaded drill chuck of the electric hand drill instead of being matched with a coal drill; and the straight shank drill chuck or the straight shank threaded drill chuck is matched with the el