Tubular object clamping and rotating device

The invention discloses a tubular object clamping and rotating device which comprises a clamping jaw assembly used for clamping a tubular object, a pull rod assembly used for supporting the tubular object and a shell used for installing and fixing the clamping jaw assembly and the pull rod assembly. The rotating assembly is used for driving the clamping jaw assembly to rotate, the sliding assembly is used for driving the clamping jaw assembly to clamp, the rotating assembly comprises a rotating shaft and a driving device, the rotating shaft is sleeved with the shell, the driving device is fixed to the rotating shaft, and the shell is matched with the rotating shaft through a first bearing assembly. According to the device, the tubular object is clamped through the clamping device and actively rotates, and the blank that clamping and rotating actions cannot be fully automatically achieved in the machining and forming process of the tubular object is filled up; clamping or rotation is freely controlled accordin