CsPbBr3 quantum dots were prepared by room temperature recrystallization. The quantum dot crude solution was purified by high-speed centrifugation using six common polar solvents. The photoluminescence spectrum after each step in the purification process was monitored and the absorption spectrum was used. Fluorescence lifetime, X-ray diffraction analysis and transmission electron microscopy were used to characterize the CsPbBr3 quantum dots purified by six polar solvents. The results show that cubic phase CsPbBr3 quantum dots with good crystallinity can be obtained by purification of six polar solvents. The supernatant obtained by the second centrifugation during purification process using six different polar solvents has the most uniform half-width and peak wavelength; except for ethyl acetate, the supernatant obtained by the second centrifugation has the highest quantum yield; in contrast , the CsPbBr3 quantum dots obtained by isobutanol purification have higher Luminescence performance.