YKLcombined underslung crane system would be better applied in connecting different manufacturing processes, taking no ground space, convenient for transporting cargos among different stations. YKL-Track design could cut down the lifting lugs of fixed rail, to simplify the auxiliary suspension, leave out the overhead steel structure, relieve workshop loads, to save cost. It is easy to install and move with accurate position and safe operation. The loads is up to 2000kg, girder length spans to10m, and the distance of hanging points of rail could be up to9m.