Objective: To explore the suitable load of endurance training for primary school students with different BMI levels living in 3 200 m plateau, and to provide guidance for exercise and weight control for children residing in high altitudes. Methods: The heart rate deflection point (HRDP) and HRDPspeed of 7-12 year-old students residing at high altitude were evaluated by using the site Conconi test. The serum lipid metabolism level was detected by ELISA. The correlation between HRDP and lipid metabolism was analyzed by Pearson correlation analysis. Results: The level of leptin, adiponectin, total cholesterol(TC) and triglycerides(TG) in obesity group was highest, follow by the overweight group, normal weight and under-weight group(F=3.75-24.12, P<0.05). In the same age group, hrdpspeed decreased with the increase of BMI. For children with the same BMI classification, HRDPspeed decreased with age. HRDPspeed showed an increasing trend by age and BMI. In obese, normal and emaciated students, there was a significant negative correlation between lipid metabolism and HRDP, but there was no significant correlation between lipid metabolism and HRDP in overweight students of different ages (P>0.05). Conclusion It is suggested that HRDP and lipid metabolism may be signcficantly correlated with BMI in students aged 7-12 years at different BMI levels in plateav and the above indicators can be used as an effective means to evaluate aerobic exercise endurance capacity of healthy adults at plateau.