The invention provides a method for preparing organic glass microballoons rapidly. The method comprises the following steps of washing a monomer by using an NaOH solution; then standing for layering after washing, and extracting upper-layer monomer liquid; adding distilled water into a container with a stirring and condensing device and heating in a water bath; adding an inorganic dispersing agent into the container and stirring to sufficiently disperse the inorganic dispersing agent; adding the monomer, a cross-linking agent and an initiator into the container; rising the temperature of the interior of the container to 75-95 DEG C; enabling the mixed solution in the container to react for 20-60 minutes; carrying out suction filtration on the mixed solution after reaction and washing the sediment; and finally drying the washed sediment so as to prepare the organic glass microballoons. The method provided by the invention can be used for preparing uniformly dispersive organic glass microballoons, the preparation period is short, the preparation method is simple, the grain sizes of the prepared microballoons are controllable, and the method is convenient for commercial production.