The invention discloses a digital pressure gauge, which is characterized in that the digital pressure gauge comprises a piezoresistive pressure transducer, a temperature detection circuit, two A/D conversion circuits and a microprocessor. On one hand, the microprocessor carries out sampling by the A/D conversion circuit I so as to obtain a voltage value corresponding to a current pressure signal; on the other hand, the microprocessor carries out sampling by the A/D conversion circuit II so as to obtain an output voltage value of the temperature detection circuit, and accurately calculates the temperature of the piezoresistive pressure transducer, then modifies the obtained values according to a temperature compensation method and a nonlinear compensation method so as to calculate more accurate pressure value, and finally, transmits digital signals by a communication module. The temperature detection circuit of the invention can accurately detect the temperatures of pressure sensitive components in the piezoresistive pressure transducer, thereby carrying out more accurate temperature compensation.