Objective To evaluate the effect of posterior capsular opacification and Nd∶YAG laser capsulotomy on the accommodative function of the 1CU accommodative intraocular lens （1CU AIOL）. Methods This was a retrospective study. Twenty patients （24 eyes） with posterior capsular opacification after phacoemulsification and implantation of an 1CU AIOL were included in the study. Uncorrected distance visual acuity， best corrected distance visual acuity （5 m）， distance corrected intermediate visual acuity （50 cm）， distance corrected near visual acuity （33 cm）， and amplitude of accommodation with subjective techniques of near point and defocusing were measured at 3 months after ICU AIOL surgery， 1 day before Nd∶YAG laser capsulotomy and 3 months after Nd∶YAG laser capsulotomy. All data were statistically analyzed with repeated measure analysis of variance （ANOVA）. Results Compared to 3 months after ICU AIOL surgery， uncorrected distance visual acuity （F=108.87， P＜0.01）， best corrected distance visual acuity （5 m） （F=116.97， P＜0.01）， distance corrected intermediate visual acuity （50 cm） （F=79.89， P＜0.01）， distance corrected near visual acuity （33 cm） （F=118.84， P＜0.01）， and amplitude of accommodation （F=81.78， P＜0.01） with subjective techniques of near point and defocusing had all decreased at 1 day before Nd∶YAG laser capsulotomy， and had increased by 3 months after Nd∶YAG laser capsulotomy. The differences were statistically significant. There was no statistically significant difference between the two methods for measuring amplitudes of accommodation （F=0.272， P＞0.05）. Conclusion Conclusion The accommodative function of the 1CU AIOL had obviously decreased because of the presence of posterior capsular opacification and recovered after Nd∶YAG laser capsulotomy 3 months after surgery.