The invention discloses an inclined sand feeding system based on V-process casting. The inclined sand feeding system is provided with a feeding device. A sand box system is movably and/or adjustably arranged below the feeding device. A sand box (5) is arranged in the sand box system and is arranged below the feeing device in the manner that the sand box (5) can move and can change the sand feeding angle. A vacuum box (6) is further arranged in the sand box system, and the vacuum box (6) is fixedly or detachably arranged outside the sand box (5). The inclined sand feeding system based on the V-processing casting overcomes the defects that when existing V-process casting is carried out, sand feeding is inconvenient and slow, and sand is prone to leakage. According to the inclined sand feeding system, the movable sand box system capable of adjusting the sand feeding angle is arranged below the feeding device, an inclined angle is formed between the sand box system and the feeding device, so that sand materials in the feeding device can be rapidly, accurately and conveniently fed into the sand box system, and the sand leakage condition is also avoided; and in this way, the labor cost is effectively reduced, and the work efficiency is improved at the same time.