To observe the axial length in early stage(6-8 years old) after pediatric cataract extraction and intraocular lens implantation. METHODS: A cross section case series of total 15 IOL infants (26 eyes), who had undergone pediatric cataract extraction, posterior continuous curvilinear capsulorhexis and anterior vitrectomy within 3 months and received intraocular lens implantation till the axial length of 21mm (about 2 years old). Patients were divided into 3 groups based on their ages at follow-ups:6 years group, 7 years group, 8 years group.The changes of axial lengths in each group were measured.The changes of axial length were analyzed and compared with those of normal age-gender-matched children. RESULTS:The mean axial length from 6-8 years group was 23.75±1.40,23.88±1.73 and 23.91±1.55mm respectively. Axial length in 6 years group was longer than that in normal control group , the difference was statistically significant (P<0.05), There was no difference between 7-8 years groups and normal control group (P>0.05). CONCLUSION: The axial length of young children,following second term IOL implantation at the age of 6 was longer than that of normal children,but there was little change compared with normal children after the age of 7.