Captive animals are prone to stereotyped behaviors, which affect the reproduction, survival, and even ex situ conservation efficiency directly. This study was conducted from May to July in 2016, at Maerkang Musk Deer Farm (MMDF), Sichuan Province. The stereotyped behaviors and the occurrence of 75 Forest Musk Deer (Moschus berezovskii) were recorded by focal sampling method, and the effects of sexes, age, density and environment heterogeneity on stereotyped behaviors were analyzed by Mann-Whitney U Test and Kruskal-Wallis H Test. The results indicated that the duration of stereotyped behaviors of captive Forest Musk Deer was 20.53% ± 2.43% (n = 75) in 10 minute sampling duration, and that in females (18.14% ± 3.26%, n = 46) was lower than that in males (20.89% ± 3.98%, n = 25). Age had significant effects on the duration of stereotyped behaviors (P < 0.05), the duration of stereotyped behaviors in subadult (13.46% ± 3.17%, n = 34) was the lowest. Environmental heterogeneity also had significant effects on the duration of stereotyped behaviors (P < 0.05). Musk deer kept in bare land spent most time in the stereotyped behaviors (33.11% ± 6.16%, n = 24). No any significant effects were found in social structure and density on duration of stereotyped behaviors although muskdeer in mixed group showed lowest duration in stereotyped behaviors (19.31% ± 3.18%, n = 53). Increasing the captivity vegetation cover and raising them in mixed groups can effectively reduce the stereotyped behaviors of captive forest musk deer.