The present invention discloses an improved hazardous waste safe landfill disposal device. The device comprises a main frame body, an electricity connection device arranged in the main frame body anda locking device arranged in the main frame body, the electricity connection device comprises a main groove penetrating the internal portion of the main frame body up and down, a through hole locatedin the main groove and communicating with the main groove is bilaterally symmetrically arranged in the main groove, a first electricity connection plate is fixedly arranged at the internal portion ofthe inner wall of the left side of the through hole at the left side, a first cable located at the internal portion of the main frame body and having one end extended out of the end face of the left side of the main frame body is fixedly connected with the left end of the first electricity connection plate, a second electricity connection plate is fixedly arranged at the internal portion of the inner wall of the right side of the through hole at the right side, and a second cable located at the internal portion of the main frame body and having one end extended out of the end face of the rightside of the main frame body is fixedly connected with the right end of the second electricity connection plate.