Abstract: In view of the existing problem of relatively large limitations of utilizing geophysical method to detect complex multi-layer goaf formed by steeply inclined coal seams,and difficulty in ensuring detection accuracy and reliability,multiple types of geophysical exploration methods such as high-density resistivity method,micro motion exploration,transient electromagnetic,gravity and others are used for testing.By utilizing the combination of high-density resistivity method and micro motion exploration method,the detection effect of complex multi-layer goaf formed by steeply inclined coal seams is relatively good;The planar distribution range of the goaf using the inversion results of high-density resistivity method is preliminarily delineated,later on,micro motion exploration within the delineated abnormal area is carried out to further determine the deep extension situation of the goaf along the inclination direction.The mutual verification and interpretation inference of the two methods provide theoretical basis for drilling verification of the distribution range,"three zone" situation,and water accumulation situation of underground goaf.