Special appurtenance of combined electrical apparatus disintegration, including punch holder and punch holder, punch holder upper portion installation push rod, the quick high stable dismouting device of installation between push rod and the punch holder, the upper portion installation buffer tube of push rod, tubular shell that the buffer tube sealed for the upper end, the piston is installed to the upper end of push rod, the utility model discloses poor stability in the traditional approach operation, low, the inconvenient problem of operation of security are utilized to well the solution, does the traditional approach need the people cooperates and to accomplish, one -man operation can easily be realized to the instrument, and the operation is stable, safer more, has improved the efficiency of combined electrical apparatus disintegration work. The utility model discloses a go up ejector pin and ejector pin combination down, make the promotion scope of hydraulic press improve to realize the operation of expansion generating line section of thick bamboo interval.