Abstract: In order to study the forward modeling of different intervals between layers by high density resistivity method employing Wenner device and obtain the change of interval between layers on the response of high-density resistivity method, double-layer low-resistance goaf model （ｍｏｄｅｌⅠ）, double-layer high-resistance goaf model （ｍｏｄｅｌⅡ）, double-layer high-low resistance goaf model (model Ⅲ: high resistance in the upper part, low resistance in the lower part), double-layer low-high resistance goaf model (model Ⅳ: high resistance in the upper part and low resistance in the lower part) were established. It is found that the high density resistivity method is less sensitive to modelⅠwith the increase of h, which can not distinguish the location of the abnormal body；for modelⅡ, when the interval of double-layer high-resistivity anomalous body is less than 30 m, it can not distinguish the position of the double-layer anomalous body. And when the interval between layers is more than 40 m, the position and extent of the double-layer anomalous body can be distinguished effectively. For model Ⅲ, the existence of anomalous body can be shown, but the vertical position error is large; model Ⅳ can distinguish the upper resistance and the lower resistance, but not accurately determine the location of the lower resistance of the body.