The invention discloses a diesel power generation system applied to an isolated sea island microgrid. The diesel power generation system applied to the isolated sea island micro-grid comprises a controller, a monitoring system, a switch device and a protecting and monitoring device, wherein the controller integrates a grid connecting function, a machine connecting function, a multi-machine load distributing function, a unit quiescent load operation function, a generator power adjusting function, a data acquisition function, a display function and a remote communication function and adjusts the parameters of a speed controller and the parameters of a voltage regulator in a digital control mode, the monitoring system is used for monitoring the controller, a power system and an oil circuit system and displaying, the switch device comprises a remote communication interface and an electric operating mechanism, and the protecting and monitoring device comprises a remote communication interface and is used for conducting protection according to the state of a diesel generating unit. According to the diesel power generation system applied to the isolated sea island micro-grid, a communication protocol of the diesel power generation system is converted into a communication mode adaptable to the isolated sea island micro-grid through a protocol converting device, and information interaction is carried out between the diesel power generation system and the micro-grid through a data switching exchanger. Due to the fact that the diesel power generation system is obtained through the improvement of a traditional diesel power generation system in the power supply mode of the isolated sea island micro-grid, and cost and investment of micro-grid project construction are saved.