The invention discloses a cutting device based on a unified specification. The cutting device based on the unified specification comprises a machine frame, two fixed mechanisms are arranged symmetrically on the machine frame, the fixed mechanisms include two fixed blocks arranged symmetrically, a screw is arranged on each fixed block in a penetrating mode, an arc-shaped clamping block is arranged at one end of each screw, the other end of each screw is fixed through a nut, and the two arc-shaped clamping blocks are arranged oppositely; a vertical column is further included, a mechanical arm is hinged to the top end of the vertical column, a motor is arranged inside the mechanical arm, a saw blade connected with the motor is arranged at the non-hinged end of the mechanical arm, and an air cylinder matched with the mechanical arm is arranged on the machine frame; and a limiting plate is arranged at the end, away from the air cylinder, of the machine frame, a groove matched with a rubber hose is formed in the limiting plate, clamping grooves for clamping a clamped board is formed in the bottom of the groove, a bolt is arranged on the upper sidewall of the groove, and the limiting plate is arranged outside the fixed mechanisms. According to the cutting device based on the unified specification, the problems that an existing hose cutting machine can only be used for cutting rubber hoses of the same size, and the cut rubber hoses are of different lengths can be solved.