The invention discloses a three-phase silicon controlled rectifier voltage regulating system with self-adaptive performance, which is provided with an input wiring unit, wherein the input wiring unit is provided with three-phase power ports A, B and C, a silicon controlled rectifier conduction angle control signal PWM port and an enable signal EN port, the three-phase power ports A, B and C are connected with the input end of a three-phase power synchronous sampling transformer, the output end of the three-phase power synchronous sampling transformer is connected with the input end of the three-phase power synchronous processing unit, and the output end of the three-phase power synchronous processing unit, the conduction angle control signal PWM port and the enable signal EN port are all connected with the input end of a programmable logic device CPLD, the output end of the CPLD is connected with an output wiring unit through a driving isolation unit, and the output wiring unit is provided with six silicon controlled rectifier conduction angle trigger signal output ports P1P2, P3P4, P5P6, P7P8, P9P10, P11P12.