The invention provides a manual and pneumatic integrated steam cylinder which comprises a cylinder, a piston, a piston rod, a manual rotary apparatus and a height indicator. The piston is arranged in an inner cavity of the cylinder, one end of the piston rod is connected onto the piston, the piston rod and the piston can slide relatively within a certain range, a screw is arranged at the other end of the piston, an integral nut is arranged on the screw, is connected with the upper portion of the cylinder and can rotate relatively, the manual rotary apparatus is mounted on the upper portion of the nut, the height indicator is mounted on the manual rotary apparatus, and two air vents are formed in the cylinder and are respectively positioned at the top and the bottom of a piston activity cavity in the cylinder. The manual and pneumatic integrated steam cylinder has the advantages that the strength of the integral trapezoidal nut is improved, and the size of the nut is reduced; the steam cylinder can be operated in the total stroke, so that equipment is lightened and is high in operability; balls are arranged between the piston and the piston rod and are used as limiting devices, so that the piston rod can be prevented from rotating along with the nut in a manual mode, and the manual rotary apparatus can be prevented from acting in a pneumatic mode.