The deep geological structure of kimberlite in the Mengyin area of the Shandong Province is one of the research hotspots in geosciences. A 10 km comprehensive geophysical exploration was carried out in the Xiyu rock belt in the center of kimberlite distribution area in the Mengyin County. The deep fault structures of Shangwujing and Xiyu were inferred by seismic reflection, magnetotelluric sounding and gravity survey interpretation. Among them, the Xiyu fault zone is a pre- controlled structure and magma channel for kimberley magma intrusion. In the Xiyu fault zone, the anomalies of seismic reflection in- phase axis, gravity low- density body and resistivity low resistance are obvious. Also, the anomaly zone has certain continuity and scale, which is consistent with the known distribution form of shallow kimberlite. It is speculated that within a depth of 4 km of surface extension, there should be a good development of kimberlite in the Xiyu rock zone, and the rock mass presents nodal discontinuous distribution in the depth. The hidden explosion of kimberlite magma near the surface of the earth results in more fracture zones and secondary faults, forming kimberlite zones composed of dense and scattered kimberlite bodies, and at the same time producing low resistivity and low density anomalies in rocks.