Objects The pediatric patients in the emergency department are varied from different ages, while the calculation of pediatric medicine dosages and equipment sizes are all based on body weights.The Broselow tape is used wildly in some countries.The main objectives of this study was to determine whether there is a relationship between actual body weight and the Broselow tape predicted body weight in the mainland Chinese population and the impact on the pediatrics calculated medical dosage and equipment size.However, accurate body weights are not always determined easily, especially on very sick children.In mainland of China, various methods are used to determine the body weights, including directly measurement by a scale, visual assessments by a physician or parents, and estimation based on length-weight formula.There is a great lack of related reports published in mainland of China.Our object was to certify the accuracy of Broselow tape in Chinese children population.Methods Data was collected from an emergency department of pediatric hospital during March 20th to April 20th, 2013.All patients were divided into 3 groups:<=10kg (n=217), 10-18kg (n=411), >=18kg(n=240).The weighs, heights, and ages of patient were obtained at triage room by volunteer college students.Estimated weights were obtained according to Broselow tape.Accuracy was accessed by agreement on Broselow color-coded zones, and the within 10%agreement between the measured and the Broselow-predict weight.Results The average age was 46.2month-old, the average body mass index(BMI)of measured weight group was 16.53, mean body weight was 14.94kg, the agreement percentage in 3 groups within 10% between measured and Broselow-predict weights was 59.4%,69.8%and 63.0%.As well the agreement percentage of color-code zone was 62.7%, 69.6%, 56.2%.Conclusions Generally, Broselow tape predicted weights underestimated measured weights, and had best accuracy in the 10-18kg group, compared to the research data of India, US.It's suitable to apply Broselow tape in Chinese children.