Objective To test the reliability and validity of "China Developmental Scale for Children (CDSC)" aged from 4~6 years. Methods According the level of area,gender and the education of the major caregiver sampled 916 children(490 boys and 426 girls) were in Beijing to test the reliability and the validity of the CDSC including test-retest reliability,internal consistency coefficient,construct validity and criterion-related validity. Results 1)Test-retest reliability:the test-retest coefficients of developmental quotient (DQ) was 0.90,that of five dimensions (gross motor,fine motor,language,adaptive and social behavior) were 0.78,0.84,0.89,0.89,0.94 respectively; 2)Internal consistency coefficient:The Cranach's α of DQ ranged from 0.86 to 0.91,that of the five subsets ranged from 0.71 to 0.87,0.63 to 0.83,0.63 to 0.78,0.48 to 0.78 and 0.47 to 0.73 respectively.3)Construct validity:The factors loading of each item were all above 0.3.4)Criterion-related validity:The Pearson factor of Wechsler Preschool and Primary Scale of Intelligence Revised (WPPSI-R) was 0.78. Conclusion The CDSC (4~6 years old) has well succeed the CDSC (0~3 years old),it has good structure effectiveness and discrimination and matches the diagnose development scale parameters,it can be used as development diagnostic tool.