The invention relates to a crystallization method for fluorene purification. The method comprises the following steps: dissolving a raw material fluorene in a solvent at 85-95DEG C, wherein the mass ratio of the solvent to the raw material fluorene is 0.5-1.3:1; cooling the obtained solution to 40-50DEG C at a cooling rate of 0.2-1.0DEG C/min, and maintaining the temperature constant for 20-40min; adding an elution agent in a dropwise manner, and maintaining the temperature constant for 20-40min; cooling the obtained solution to 20-30DEG C at a cooling rate of 0.2-1.0DEG C/min, and maintaining the temperature constant for 20-40min; and carrying out solid-liquid separation and vacuum drying to obtain fluorene crystals. The operation conditions of the method are simple and can be easily controlled. The purity and the yield of a fluorene product obtained through one-time cooling, elution, and coupling crystallization are about 90% and above 80% respectively; and the purity of a fluorene product obtained after three-time cooling, elution and coupling crystallization can reach above 99%, and the total yield of fluorene components is above 50%. The method has an obvious economic benefit.