Abstract: Objective By clinically observation and correct children maxillary supernumerary on time is the best way to reduce the happens of children development disorders.Methods Select 109 outpatient clinic cases of whom birth are from Jan,1996 to Dec,2008.Among of them are 62 male and 47 female.Average age are 10 years old.All of them were applied as extraction surgery.Results In 109 maxillary supernumerary teeth cases,the ordering of their predilection for the mixed dentition is period of permanent teeth out and period of primary teeth out.Males are more than females.The ratio is 2 in 1.Conclusion Children with maxillary supernumerary teeth should be dental corrected and extracting surgery in early period.It is the key of prevention and treatment for children with maxillary supernumerary teeth.