The invention provides a multi-phase flow evaporation system. The multi-phase flow evaporation system comprises a circulating pipe (16), a heating chamber (6), an evaporative separation chamber (8), a particle filter (4) and a distributor (19), wherein a solid particle inlet (15) is formed in the circulating pipe (16); the circulating pipe (16) is connected with the particle filter (4); the particle filter is connected with the heating chamber (6); the heating chamber (6) is connected with the evaporative separation chamber (8); a material outlet of the evaporative separation chamber (8) is connected with the circulating pipe (16); a steam outlet is formed in the evaporative separation chamber (8). The multi-phase flow evaporation system provided by the invention is compact in structure, the evaporation area is effectively improved, the evaporation efficiency is greatly improved, and the steam consumption is reduced. Due to the addition of the distributor, the heat exchange efficiency is improved, scale formation or wall attaching of a heat exchange pipe is prevented, and the cleaning cycle of an evaporator is prolonged.