The invention relates to a multi-channel analog signal data acquisition automatic correction circuit and correction method, relates to a multi-channel analog signal data acquisition circuit needing automatic zero calibration and full-scale calibration, and belongs to the electronic technology application field. The multi-channel analog signal data acquisition automatic correction circuit is formed by connecting signal acquisition circuits, an A/D converting unit and a control unit in sequence. Each signal acquisition circuit comprises a signal amplification unit, a standard full-scale signal end, a standard zero signal end and an electronic switch. The control unit is connected with the control end of the electronic switch; and the signal amplification unit, the standard full-scale signal end and the standard zero signal end are connected with the input end of the electronic switch. The control unit sends control information to the electronic switch, and the electronic switch is automatically switched to be connected with a sensor signal end, the standard full-scale signal end or the standard zero signal end, and transmits the input end signal to the signal amplification unit; the signal of the sensor signal end is from a sensor; and the signal of the standard full-scale signal end and the signal of the standard zero signal end are from a circuit standard power supply signal.