Background: Executive function (EF) deficit could be detected in children born very low birthweight (VLBW) with seemingly normal development after birth until they are age 6. Yet, it is still not known if such deficit could be predicted early from their performance at age 2 or even younger. Therefore, the goal of present study is to investigate if Bayley Scales of Infant Development, Second Edition (BSID-Ⅱ) could predict EF at age 6 using early performance at age 2 or younger. Meanwhile, establish a new subscale of BSID-Ⅱ at age 2 for optimal prediction of EF at age 6 of VLBW children with seemingly normal development and normal IQ before age 5. Methods: Seventy-six VLBW children were included at age 6, with developmental scores more than 70 of BSID-Ⅱ before age 2 and intelligent quotient more than 70 of Wechsler Preschool and Primary Scale of Intelligence–Revised (WPPSI–R) at age 5. Five instruments, including Comprehensive Non-verbal Attention Test Battery (CNAT), Tower of London (ToL), Wisconsin Card Sorting Test (WCST), Knox’s Cube Imitation Test (KCIT), and Digit Span Subtest of WISC-IV, were analyzed to evaluate four kind of EF, including inhibition, planning, cognitive flexibility and working memory. BSID-Ⅱ was used as developmental index. The predictive validity was investigated with correlation, backward regression and ROC method. Results: At the corrected age of 12 months, there was no EF index which AUC was larger than .65 when using ROC analysis. At the corrected age of 24 months, EF indexes which AUC was larger than .65 were the Backward score of KCIT and the Backward score of DS of WISC-IV. Conclusions: The predictive validity of BSID-Ⅱ performance at the corrected age of 12 months was not as good as corrected age of 24 months. At the corrected age of 24 months, part of the items of BSID-Ⅱ were predictable for both verbal and nonverbal working memory in VLBW children age 6, but not for planning, inhibition, and cognitive flexibility. These items were MDI item 115, 116, 117, 118, 120, 123, 125, 126, 129, 131, 137, 138, 141, 143, 144, 145, 147.