Objective: To investigate the impacts of sports game curriculum on the physical development of preschool children aged 3 to 5 years, so as to provide a reference for sports education and intervention among preschool children. Methods: Totally 176 preschool children aged 3 to 5 years in the large, medium and small class of a kindergarten in Changzhou were selected by means of cluster random sampling, and they were randomly divided into observation group (n=85) and control group(n=91). The control group did not receive special intervention, while the observation group received sports game curriculum, the intervention time was 1 year. The body shape and physical fitness indicators were tested and compared before and after intervention. Results: In terms of body shape, the increase in height of the observation group was (6.57±0.41)cm, which was significantly higher than (5.77±0.36)cm of the control group(t=13.78, P<0.01); There was no significant difference in weight gain between the observation group and the control group (2.53±0.35)kg vs (2.61±0.43)kg(t=1.35, P>0.05). The physical fitness indicators, including standing long jump, continuous jumping of the feet, sit-and-reach, tennis throwing, single foot balance and 10 m×2 shuttle run effects were (95.93±4.02)cm, (6.72±0.35)s, (11.65±1.33)cm, (6.21±1.50)m, (45.26±8.74)s,(6.91±0.13)s in the observation group, significantly better than (82.71±3.59)cm, (7.52±0.41)s, (10.06±1.32)cm, (5.34±1.21)m, (36.14±6.72)s, (7.36±0.17)s in the control group(t=23.04, 13.88, 7.96, 4.25, 7.79, 19.63, P<0.05). Conclusion The sports game curriculum has no significant effect on the weight of preschool children aged 3 to 5, but it can promote the height growth of children and helps to improve physical fitness.