The invention discloses a printing machine for biodegradable film. The printing machine comprises a printing machine main shell and a winding shaft to be printed; a film winding driving motor is arranged inside the printing machine main shell, a central control processing device is fixedly installed on the right side of the film winding driving motor, a printing control processing device is arranged on the upper portion of a printing fixing plate, a hydraulic device is arranged in the circle center of the printing fixing plate, a printing head is arranged below the hydraulic device through a hydraulic rod, a printing sensing device is arranged at the bottom of the printing fixing plate, an alarming device is arranged on the upper portion of a printing device outer shell, and the winding shaft to be printed is installed at the bottom of a groove. According to the printing machine for the biodegradable film, the printing precision and the printing quality are improved, emergency stop is achieved when the printing machine is abnormal, and an alarm is given out, so that an operator handles equipment in time, the phenomenon of defective printing is reduced, and the printing speed is increased.