The utility model relates to a single-phase alternating current voltage stabilizer based on digital circuit control. The single-phase alternating current voltage stabilizer based on the digital circuit control comprises a transformer of which the input end is connected to the power grid; the output end of the transformer is the independent output formed by six secondary coils respectively; the output end of each coil is connected with an IGBT switch module to control the on-off of the corresponding output; two ends of the transformer output are connected with a load Z; an alternating current valid value detecting module circuit of which the input end is connected to two ends of the load Z is used for monitoring the working voltage of the single-phase alternating current in real time, and comparing the obtained voltage signal valid value with the preset value, sending two obtained threshold logic control output signals to a logic control circuit; the logic control circuit is used for performing the logic processing to the control signals of the alternating current valid value detecting module, and respectively outputting six routes of control signals to a drive circuit; six routes of drive signals output by the drive circuit are respectively connected with six IGBT switch modules of six secondary coil output ends, and the on-off of six IGBT switch modules is controlled; and the power is supplied for each module in the voltage stabilizer by the power module. The single-phase alternating current voltage stabilizer based on the digital circuit control is capable of effectively solving the problem that the risk is brought for the user because of poorer power supply quality of the electric grid, and supplying the reliable and stable power supply for the user.