The invention relates to a solving method for node marginal electricity price, and the method is based on the B coefficient transmission loss correction of a DC method and gives consideration to load-side quoted price. The method comprises the steps: a DC method B coefficient and a power transfer factor SF; building an economic dispatching model comprising an optimization target, unit constraints,and load flow constraints; deducing a node marginal electricity price model, and determining the node marginal electricity price; determining transmission loss micro-increasing rates of a generator node and a load node; determining a marginal node and a full-load circuit; determining an unknown full-load circuit shadow price Mu and system electric energy price lambda; and determining the node marginal electricity price of a non-marginal node. According to the technical scheme of the invention, the method is high in applicability, can be used for solving the node marginal electricity prices ofthe generator node, a quoted sensitive pure load node and a non-quoted rigid pure load node, and is suitable for market pricing at each stage of electricity market construction. The detailed solvingmethod provides references for the development of the solving software of the node marginal electricity price.