The invention relates to an economic dispatching technology of a power system, in particular to a multi-source optimal dispatching method considering coordination of wind power, nuclear power and pumped storage. The method includes a step 1 of taking into account the cost of abandoning wind and the cost of peaking of nuclear power, and constructing a coordinated optimization model of wind core with multiple power sources; a step 2 of Linearizing the nuclear power peak shaving constraint by subdividing the nuclear power peak shaving depth, solve the scheduling model based on Cplex, and making the scheduling plan. By taking into account the cost of wind power and nuclear power peak load regulation, wind power and nuclear power are included in the coordinated dispatching, which can greatly alleviate the pressure of peak load regulation, reduce the frequent start-up and shutdown of conventional generating units, and improve the operation economy of the power system with wind power and nuclear power in the coastal area. By subdividing nuclear power peak shaving depth linearization nuclear power peak shaving constraint method, nuclear power peak shaving operation constraint linearizationis realized, so that the scheduling model can be solved efficiently based on commercial optimization solver Cplex, and an accurate optimal scheduling scheme can be obtained, which is helpful to reduce the system operation cost.