The utility model relates to an electric processing equipment field discloses a lever over -and -under type copper bar bus connects soldering device, include the base, melt tin mechanism, lever copper bar elevating system, copper bar fixed establishment and copper bar wiping mechanism. Lever copper bar elevating system includes main heel post, over -and -under type main tributary strut and lever lifting adjusting mechanism, on the base was located immediately to main heel post, over -and -under type main tributary strut was fixed in in the draw -in groove of main heel post, lever lifting adjusting mechanism includes lift operating lever, and lift operating lever's fulcrum pivoted joint is on main heel post, and lift operating lever's tail end pivoted joint is on over -and -under type main tributary strut, copper bar fixed establishment is fixed in on the over -and -under type main tributary strut, it locates on the base to melt tin mechanism. The utility model discloses the device can be realized connecting copper bar bus carrying out the soldering operation semi -automaticly, and work efficiency is high, and soldering is effectual, and the security is good, and the cost of manufacture is low, does benefit to the popularization.