The invention relates to a three-chamber refrigerator body foaming mold. The three-chamber refrigerator body foaming mold comprises a baseplate, a foaming liner, a left side door plate, front and back cushion frames positioned on front and back two sides of the foaming liner, a bent box positioned on the right side of the foaming liner, and a back plate positioned at the bottom of the right side of the foaming liner; the foaming liner includes a R chamber liner mold, a V chamber liner mold and a F chamber liner mold; a power guide rod is arranged on the baseplate; convex block bodies are arranged on two sides of the R chamber liner mold; a convex block extension mechanism and a three-way support mechanism are arranged in the R chamber liner mold; and buckle extension mechanisms are respectively arranged in the V chamber liner mold and the F chamber liner mold. The three-chamber refrigerator body foaming mold uses the power guide rod for realizing the same driving, is simple in structure, and is synchronous and coordinative in movement of all parts; the convex block extension mechanism realizes formation of a larger groove in a refrigerator body; the three-way support mechanism can effectively support a product to prevent collapse, and can shrink back to conveniently strip the mold during demolding; the convex block extension mechanism and the buckle extension mechanisms are both guided by using Z-shaped chutes; and the three-chamber refrigerator body foaming mold is simple in structure, excellent in locking effect and excellent in stability.