The utility model discloses a multi -functional chain type conveying hydraulic leg, including sprocket, chain, hydraulic leg, go up the oil pipe swing lead arm, rocking pawl, down the oil pipe swing lead arm, bracing piece, both ends all set up the sprocket about the hydraulic leg, two chains of chain winding take turns to, upward oil pipe swings to lead and articulates on the bracing piece of being connected with the hydraulic leg through the hinge between the bizhong, it is articulated with the chain axle of hydraulic leg lower extreme sprocket that the arm is led in the oil pipe swing down, rocking pawl one end articulates on the arm is led in the swing of last oil pipe, the articulated rocking pawl hydraulic stem upper end of the other end, and rocking pawl hydraulic stem lower extreme articulates on the bracing piece, lower oil pipe swing is led the arm and is located hydraulic leg outside bottom, last oil pipe swing is led the arm and is located hydraulic leg inboard upper end. The utility model discloses reduce intensity of labour, improved efficiency and security. The effect of supporting sled dress chassis is played to while.