To understand the response of array laterolog to fracture in the fractured reservoir, based on the plane model of parallel fractures with equal space, the three-dimensional finite element method is used to simulate the responses of the high-definition array laterolog in fractured formation with different fracture parameters. The results show that conductivities of array laterolog are linearly related to the porosity of fracture and the conductivity of pore fluid. A negative separation between the deep and shallow resistivity appears in the low-angle fractured formation, the positive appears in high-angle conditions. The above researches have contributions to the application of array laterolog in the fractured reservoir evaluation.