2-(1,1,2,3,3-Pentamethylindan-5yl)propanol (commonly known as indanol) was synthesized by the reaction of 1,1,2,3,3-pentamethylindane with propylene oxide, catalyzed by anhydrous AlCl3 using dichloromethane as solvent. The product was purified through ultrasonic assisted dissolution-crystallization process. Effects of mole ratio of 1,1,2,3,3-pentamethylindane to propylene oxide, amount of anhydrous AlCl3 and reaction temperature were investigated. The selectivity of indanol was 99% under the following reaction conditions: reaction temperature was -10℃~-15℃, n (pentamethylindane)：n (propylene oxide）：n (anhydrous AlCl3) was 1:1.2:1.2, and the reaction time was 2 h. The conversion of 1,1,2,3,3-pentamethylindane was 55.8%.The purity of indanol was 99%. The peculiar burnt smell originated from the distillation process was avoided in this purification process. The structure of indanol was characterized by data of FTIR, GC-MS, HRESIMS, elementary analysis, 1H NMR and 13C NMR spectrum.