Starting from the characteristics of microgrid reactive power and voltage in the island operation mode，control measures of the microgrid reactive power and voltage are analyzed.A microgrid reactive power and voltage control strategy based on a multi-agent system（MAS）characterized by being self-approach-optimal and distributed in the island mode is proposed.By using the control method of combining the issuance of distributed energy，capacitor switching and load switching，microgrid voltage control problems in the island mode are solved.Finally，simulation verification shows that the method can effectively regulate the bus voltage of the control system and reactive power output of micro-sources，while maintaining stable operation of the system.