The utility model discloses a flexible turnover mechanical paw device. Clamping device for clamping workpieces, the clamping device comprises a floating connecting device, a first connecting plate, anoscillating cylinder, a second connecting plate, a pneumatic clamping jaw, a first clamping jaw finger and a second clamping jaw finger, the swing air cylinder is installed on the lower portion of the floating connecting device through a first connecting plate, the pneumatic clamping jaw is installed on the lower portion of the swing air cylinder through a second connecting plate, and the first clamping jaw finger and the second clamping jaw finger are both installed on the pneumatic clamping jaw. The utility model aims at overcoming the defects that a traditional mechanical gripper can onlyturn over in one plane and does not have a flexible floating function. By means of the novel layout, the mechanical paw can turn over in the horizontal plane and can also turn over in the vertical plane, meanwhile, the mechanical paw can flexibly float in the X plane, the Y plane and the Z plane through the additionally-arranged floating unit, and interference generated due to the fact that holesand positioning pins are not concentric when the mechanical paw feeds materials to a clamp is effectively avoided.