The invention relates to the technical field of intelligent grid fault analysis, specifically relates to a dead zone fault simulation method based on an integrated friend model and aims at overcoming the shortcomings of relatively large number of computational nodes, relatively low computational efficiency and the like in a grid dead zone fault model in the prior art. According to the dead zone fault simulation method based on the integrated friend model, in order to reduce the computational nodes and increasing the computation speed, a combined model of a circuit breaker and a current transformer is established by use of an integrated friend modeling method, and in combination with the characteristics of dead zone faults, the method for processing the dead zone faults under the combined model is explained in details. The dead zone fault simulation method based on the integrated friend model is simple in design, easy to implement, relatively low in construction, maintenance and energy consumption costs, and suitable for the grid dead zone fault analysis in different cases, and has wide application and popularization prospect.