Provided is a multi-range field full-automatic pressure and electric signal calibrating instrument, comprising: control components such as a shell (9), a power switch (94), multiple-interfaces (95), a display (91), a keyboard (92), and a gas pressure generating unit (1), a power supply unit (3), a pressure detecting unit (4), a gas pressure control unit (2) and an electric signal detecting unit (5); the pressure output end of the pressure control unit (2) is in parallel connection with pressure joints which are used for installing multiple pressure standard meters (60) and detected meters (7) with different ranges; the pressure control unit (2) is in signal connection with the pressure standard meters (60); the electric signal detecting unit (5) is in signal connection with the pressure control unit (2) and the detected meters (7); the power supply unit (3) can supply power by batteries. The calibrating instrument does not need to be externally connected with a gas cylinder and an alternating current power supply and can automatically generate a gas pressure and generate an accurate standard pressure; the design of the multi-range pressure standard meter can be suitable for various detected meters; the double detection and calibration for pressure and electric signals can be implemented; the weight and volume of the instrument are small; and the multi-range field full-automatic pressure and electric signal calibrating instrument is convenient to carry in the field and can carry out automatic calibration on various field pressure instruments.