The invention relates to a method for continuously preparing a 2-methallyl alcohol alcoholate solution. The method takes 2-methallyl alcohol and an alkali metal hydroxide water solution as raw materials; in a combined rectifying tower, water is removed through reactive distillation to obtain an alcohol solution of 2-methallyl alcohol alcoholate; the upper part of the combined rectifying tower is aplate type tower and the lower part of the combined rectifying tower is a packed tower; the 2-methallyl alcohol enters the rectifying tower from a first tower plate; the alkali metal hydroxide watersolution enters the rectifying tower from a second plate; a gas jetting type circulation mixing assembly is arranged on a sieve hole of a tower plate of the plate type tower; the circulation mixing assembly is composed of inner and outer hollow pipes in a sleeve joint manner; the outer hollow pipe is fixed at the upper part of the inner hollow pipe; the inner hollow pipe is communicated with the sieve hole. The method provided by the invention has the advantages that the alkali water solution is used as a raw material and an alcohol solution of the 2-methallyl alcohol alcoholate can be continuously prepared; a process has good safety and the content of free alkali in a product is low; the product can be directly applied to a preparation process of high-quality 2-methallyl alcohol polyether.