The invention relates to the power field, in particular to a live work robot. The live working robot is used for conducting wire running work along high-tension transmission lines, and obstacle crossing of the live work robot along the lines can be achieved safely and conveniently. The live work robot comprises a body, a walking mechanism, a wire feeding mechanism and a working arm. The walking mechanism comprises three separated walking arms which are installed on the body. A wheel is arranged at the tail end of each walking arm. The wheels are in an online state of being located on the upper surface of a wire or in an offline state of being disengaged from the wire. The wheels of at least two walking arms are in the online state, wherein at least one part of each walking arm can stretch and contract in the vertical direction so as to change the vertical position of the corresponding wheel relative to the wire; and a rotatable part of at least one walking arm can rotate so as to change the position of the corresponding wheel relative to the wire. The wire feeding mechanism comprises a hook and a hanging rope connecting the hook to the body. The working arm is installed on the body and comprises a tool connector at the tail end.