The invention relates to a food material pulping device, and particularly relates to a tapered continuous pulping device. The tapered continuous pulping device comprises a shell, wherein a feeding hole and a discharge hole are formed in the shell; a pulping knife roll and a dead knife which are matched with each other are arranged in the shell; the pulping knife roll is connected to a motor through a main shaft; the shell is in a tapered shape; the pulping knife roll is in a tapered shape matched with that of the shell; the dead knife is fixed on the inner wall of the shell; the feeding hole is formed in the small end of the shell; and the discharge hole is formed in the large end of the shell. The invention aims at providing the pulping device capable of greatly grinding food materials.