The invention proposes a safety-constrained economic dispatching method with embedded reactive power and voltage, which belongs to the field of electric power system safety-constrained economic dispatching, so that each node and line flow in the power grid is within the safety-constrained range, and the power grid operation cost is minimized. This method first constructs the optimal power flow model of safety-constrained economic dispatch composed of objective functions and constraints; after solving the model iteratively, check the per-unit error for all branches: if there is a line that does not meet the per-unit error, then Update the constraints of the power flow equation, and proceed to the next iteration until all lines meet the per unit error, the model converges, and the iteration ends. A complete set of power system security including node voltage amplitude, voltage phase angle, unit active output, and reactive output is obtained. Constrained economic dispatch schemes. The invention can meet the requirements of economical operation of the power system to the greatest extent, reduce the operating cost of the power system, has high precision, good convergence, and has strong practical application value.