目的　对野外驻训期间我军腹泻病的流行特征及危险因素进行初步研究。方法　对某部队野外驻训期间腹泻病发病进行流行病学调查 ,统计方法采用多元线性逐步回归和判别分析。结果　参训部队腹泻发病率较同期该地常年驻军显著增高 (7.32 %vs 0 .98% ,P <0 .0 5 ) ;干部发病率低于战士 (0 .99%vs 8.2 0 % ,P <0 .0 5 ) ;腹泻的发生贯穿整个非常时期 ,但高峰期常见于初期 ,此后逐渐趋于平稳 ,并可时有大小不等的散在暴发 ;发病率的单位分布存在明显差异。经回归和判别分析 ,结果显示发病率与参训单位的苍蝇密度和人均日供开水量有关 ,判别模型总的判别正确率达91.9%。结论　本结果为我军野外驻训期间腹泻病的预防提供了参考信息 Objective To study the epidemiological characteristics and risk factors of diarrheal diseases in our military during field training. Methods An epidemiological investigation was conducted on the incidence of diarrheal disease during field training in a certain unit. The statistical method was based on multiple linear stepwise regression and discriminant analysis. Results The incidence rate of diarrhea in participating units was significantly higher than that in the same period (7.32% vs 0.98%, P <0.05); the incidence of cadres was lower than that in soldiers (0.99% vs 8.2%, P < 0 .0 5). Diarrhea occurred throughout the extraordinary period, but the peak was common in the early period and then gradually became stable. Occurrence of scattered outbreaks of different sizes sometimes occurred. The unit distribution of morbidity was significantly different. The results of regression and discriminant analysis showed that the incidence rate was related to the flies density and water supply per person per day in the participating units, and the overall discriminant accuracy of the discriminant model reached 91.9%. Conclusion The results provide reference information for the prevention of diarrheal diseases during the field training in our army