The invention discloses a model shield machine cutter head pressure monitoring system capable of achieving the function of excavation surface pressure monitoring. The model shield machine cutter headpressure monitoring system comprises earth pressure stress sensors, osmometers, a cutter head, a cutter head bearing and a wireless transmitter. The pressure sensors are arranged on the cutter head, and the sensing faces are flush with a cutter head panel; a leading wire penetrates through a leading wire groove in the rear portion of the cutter head panel to enter the cutter head bearing; the front portion of the cutter head bearing is hollow; leading wire holes are formed in a rear bearing of a partition plate; leading wires of the sensors are led from the center of the cutter head bearing through the leading wire holes to the exterior of the cutter head bearing; and a leading wire groove is formed in the outer surface of the cutter head bearing, the leading wire is inlaid in the leadingwire groove and then led to the shield tail to be connected with the wireless transmitter. The wireless transmitter is fixed to the tail of the cutter head bearing and synchronously rotates along withthe cutter head, and thus the leading wires of the sensors can be prevented from being twisted during testing. The wireless transmitter converts electric signals of the pressure sensors into wirelesssignals to be transmitted, an external wireless receiving device receives and stores data, and the function of pressure real-time monitoring of the shield excavation surface is achieved.