The invention provides a method for wet extraction of purified microalgae oil. The method comprises the following steps: (1) adding an 
ethanol solution into ooze of collected microalgae, quickly stirring the mixture uniformly, carrying out 
centrifugation, and collecting sediments to obtain dehydrated 
algae ooze; (2) adding non-toxic or slightly-toxic 
organic solvent of a water solution of the 
organic solvent into the dehydrated 
algae ooze obtained in the step (1), carrying out 
cell disruption on the 
algae ooze, and extracting coarse oil in the microalgae; (3) carrying out 
centrifugation, collecting the coarse oil obtained in the step (2), adding water and inorganic salt into the coarse oil, stirring the mixture uniformly to form a coarse oil-water solution, adding n-
hexane into the coarse oil-water solution, carrying out standing layering or centrifugal layering after uniform mixing to form three 
layers which are the upper solution layer, the middle 
solid matter layer and the lower solution layer, and collecting the solution on the upper layer; (4) carrying out 
desolvation on the solution on the upper layer to obtain the microalgae oil. According to the method for wet extraction of the purified microalgae oil, the yield of esterified 
grease is high, operation is easy, and 
energy consumption is low.