A folding lifting device for automobile, comprising outer housing, lifting supporting plate, folding assembly and synchronous cushioning assembly. Outer housing comprises housing bottom, lifting supporting plate is provided in outer housing, and folding assembly is provided between lower side of lifting supporting plate and upper side of housing bottom; folding assembly is composed of two groups of same side V-shaped folding elements, and synchronous cushioning assembly is provided between lower sides of two groups of side V-shaped folding elements. Each of two groups of side V-shaped folding elements comprises front upper folding bar, front lower folding bar, rear upper folding bar and rear lower folding bar; first synchronous rack is fixedly provided at rear side of front lower folding bar, second synchronous rack is fixedly provided at the front side of the rear lower folding bar.