Objective      To provide the evidence for establishing a prediction and assessment model of military physical operation capacity by analyzing soldiers’s body compositions and studying the correlation between military physical operation capacity and body compositions.       Methods      Two hundred male soldiers were

enrolled in this study. Their performance of 5 000 m run

pull-ups

standing long distance jump and VO

2

max was measured following the GJB1337-92 criteria. The soldiers were divided into poorest

poorer

mode-rate

good and excellent performance groups according to the criteria. Their body compositions were measured by multiple frequency bioelectrical impedance analysis (MBIA). Correlation between their military physical operation capacity and body compositions was studied.       Results       The percentage of body fat (PBF) decreased while the percentage of body muscle (PBM) increased with the increasing physical performance. The PBM was positively correlated with the VO

2

max and performance of pull-ups and standing long distance jump （r=0.30

0.48

0.18

P0.05）and negatively with the time-consuming of 5 000 m run （r=-0.26

P0.01）. The PBF was negatively correlated with the VO

2

max and performance of pull-ups

standing long distance jump （r=-0.30

-0.47

-0.19

P0.05）and positively with the time-consuming of 5 000 m run （r=0.25

P0.05）. The waist-hip fat ratio was negatively correlated with the VO

2

max and performance of pull-ups（r=-0.16

-0.17

P0.05）.       Conclusion      The increase of the percentage of muscle is significantly positively correlated with  the military physical operation capacity

while  the increase of the percentage of fat and waist-hip fat ratio has negative relationship with military physical operation capacity. The PBM

PBF and waist-hip fat ratio can be used as important factors in prediction and assessment model of military physical operation capacity in China.