The invention belongs to the technical field of power distribution and voltage regulation in running of a distribution network, and particularly relates to a distribution network DSP voltage regulation control system. The invention provides a power grid DSP voltage regulation control system which is combined with a distribution network voltage regulation structure and is accurate and reliable in control. The distribution network DSP voltage regulation control system comprises a TMS320F28335 chip U500, a pin 74 of the chip U500 is connected with a pin 2 of the chip U500 sequentially through a resistor R239 and a resistor R236, and a pin 75 of the chip U500 is connected with a pin 141 of the chip U500 sequentially through a resistor R238 and a resistor R237; a pin 113 of the chip U500 is connected with a pin 1 of a 74ACT541 chip U7, a pin 19 of the chip U7 and one end of a resistor R30, and the other end of the resistor R30 is connected with a V3.3DP power supply.