The utility model discloses a compensation type cavity GIS equipment foundation which comprises a GIS equipment foundation body, a cavity, a foundation bottom plate, a foundation top plate and foundation side walls. A cavity is poured in the GIS equipment foundation in advance; the foundation bottom plate, the foundation top plate and the foundation side walls form a space box shape, and the overall rigidity is high. The compensation type cavity GIS equipment foundation is adopted in the structure, the overall rigidity is large, the differential settlement resistance is high, and due to the fact that the surface of the foundation top plate is smooth, GIS equipment can be flexibly arranged. Besides, the thicknesses of the compensation type cavity GIS foundation bottom plate, the foundationtop plate and the foundation side walls are small, the concrete work amount can be effectively reduced, the temperature stress can be reduced, and cracks can be effectively controlled. And the cavityin the foundation can also be used as a channel for cable laying in a power distribution device area, a cable trench in the area can be canceled, and the occupied area is saved. Therefore, the compensation type cavity GIS equipment foundation can be widely applied to transformer substation construction engineering.