The invention discloses a pressure transmitter. The pressure transmitter is provided with a plurality of film boxes and also comprises a signal conversion device and a comparator, wherein a signal output end of each film box is connected with a signal input end of the signal conversion device, a signal output end of the signal conversion device is connected with a signal input end of the comparator, the signal conversion device can be used for respectively receiving pressure simulation signals transmitted from the plurality of film boxes and respectively converting the pressure simulation signals to pressure digital signals, the comparator is used for comparing each pressure digital signal with a preset pressure signal average value, and the comparator is used for marking the film box corresponding to the pressure digital signal as an early-warning film box when an error value between one of the pressure digital signals and the preset pressure signal average value is larger than a preset error value and transmitting an average value of other pressure digital signals. After applying the pressure transistor, the true pressure of a measured medium can be accurately measured and transmitted.