The invention discloses a pressure sensor testing and calibrating device which comprises a pressurizing device, a heating device, an energy storage device, a pressure releasing device and a detectiondevice. The pressurizing device is connected with a soleplate provided with a pressure sensor via a pipeline, the soleplate is positioned in the heating device, the energy storage device and the pressure releasing device are connected to the pipeline, and the detection device is electrically connected with a pressure sensor to test and calibrate the pressure sensor. During use, the pressure sensoris mounted on the soleplate, the detection device is electrically connected with the pressure sensor, the pressurizing device applies a pressure of a set value to the pressure sensor via the pipelineand the soleplate, the heating device adjusts the temperature of the pressure sensor, the down-hole temperature and pressure are simulated to carry out zero drift test on the pressure sensor, the pressure sensor testing and calibrating device can measure output response of the pressure sensor at different temperatures, and he working standard and efficiency are improved effectively.