The forest musk deer (Moschus berezovskii) has been endangered owing to the habitat loss and musk exploitation, and musk deer farming has become an effective measure to conserve wild populations and provide medicinal musk sustainably. In musk deer farming, the health condition of captive individuals will be closely related to the reproduction and the musk production. In this study, the body condition of captive forest musk deer (299 females and 287 males) in the Maerkang musk deer farm (MMF) was surveyed during July and October 2012, using the quantified criteria system. Furthermore, the potential effects of certain influencing factors were analyzed. The results showed that, the average body score of captive forest musk deer was 3.49 (±0.02, n=586), and most of individuals (59.56%, n=349) scored higher than the average. The body condition of all females (3.50±0.02) was better than that of all males (3.49±0.03), but the difference was not statistically significant (P > 0.05). The body condition of adults (4-9 years old) (3.59±0.02, n=291) was significantly better than that of older deer (older than 10 years) (3.38±0.09, n=27) and sub-adults (2-3 years old) (3.35±0.03, n=184; P < 0.01). No significant correlation was found between musk deer's body condition and age (r=0.07, P > 0.05), but the body condition scores of the adults and sub-adults were highly significantly correlated with the animals' age (sub-adults:r=0.19, P < 0.01; adults:r=-0.16, P < 0.01); moreover, a significant negative correlation was observed between old individuals' and their age (r=-0.23, P > 0.05). The S model y=e^{1.2811-0.0885/a} (R²=0.051, df=500, F=26.74, P < 0.01) fitted the relationship between the score of captive deer and its age. Furthermore, the body condition score of musk deer in the enclosures with earth-ground was higher than those in the enclosures with brick-ground.