The invention relates to the casting field, and particularly relates to an integrated multi-way valve casting and a casting process thereof. The integrated multi-way valve casting is characterized by comprising a valve body, wherein valve element through holes, main flow channels, through holes, auxiliary flow channels, annular oil grooves and small annular oil grooves are formed in the valve body; the auxiliary flow channels and the internal main flow channels are used for connecting the valve element through holes and the through holes; the annular oil grooves and the small annular oil grooves are formed in the valve element through holes, the through holes and the auxiliary flow channels; the openings of the through holes are located in the surfaces of the main body of the valve body, and communicate with the auxiliary flow channels of the valve body. The casting process of the integrated multi-way valve casting comprises the following steps: sand box production, shell mould die production, clay core production, clay core coating, clay core and shell mould die assembly, shaping operation, casting mould limit operation, pouring operation and casting cleaning and inspection. The integrated multi-way valve casting disclosed by the invention is high in integration level, small in spatial structure, free from the problems of sand inclusion, expansion and the like on the surface, and wide in application range.