The invention relates to the field of titaniferous solution concentration and discloses a multi-effect concentration method and a multi-effect concentration device for materials. The multi-effect concentration method comprises the following steps: a working medium is added into a first cavity; the materials are added into a second cavity; water vapor formed by evaporating the materials flows intothe first cavity, is absorbed by the working medium and releases the heat; the diluted working medium flows into the second cavity through a heat exchange pipeline and is subjected to heat exchange with the materials; the first cavity conveys the working medium in a multieffect evaporator through a first pipeline; the multieffect evaporator evaporates water of the working medium and then the evaporated working medium is conveyed back to the first cavity through a second pipeline. In the multi-effect concentration device disclosed by the invention, the working medium with higher concentration releases a large amount of heat when absorbing water evaporated by the materials; the heat is transferred to the materials by the heat exchange pipeline, so that the materials are kept in a set evaporation temperature value; the process does not need to consume external heat, so that energy is saved. The process of concentrating titaniferous solution is changed into a process of concentrating the working medium. A working medium solution can be evaporated at high temperature, and working mediums can realize five-effect evaporation at below 170 DEG C.