Elementary school students have menstrual period, usually refers to menstruation, after menstruation height will continue to grow. When the girl enters puberty, gradually menstruation, is a normal physiological phenomenon, height can still grow how much individual differences, and genetics, sleep, exercise, nutrition, mental condition are related. Parents should pay attention to strengthen nutrition, promote children’s sports, let children have enough sleep, etc.. In the elementary school students after the menstrual period, indicating that has entered the puberty development period, parents must give the child to explain some physiological knowledge, and let the child pay attention to the lower body clean, change sanitary napkins and underpants, and wash the lower body diligently. The height of elementary school students did not increase for a long time, may be the existence of abnormal conditions, it is recommended to consult a doctor for examination and treatment.