The invention provides a clamping device and a forming machine with the same. The clamping device comprises a compression component and a locking component, wherein the compression component comprises a press rod and a press block arranged on the press rod, and the compression component has a first state of being adsorbed onto a forming drum and moving with the forming drum, and a second state of departing from the forming drum; and the locking component has a first position for locking the compression component and a second position for releasing the compression component. The clamping device and the forming machine with the same, which are provided by the invention, are simple in structure, and capable of stably bonding a PA composite part onto the forming drum.