Black muntjac is timid and often moves in the morning and evening. During the day, it often rests under big tree roots or in caves. When it makes a slight noise, it will immediately run into the bushes and hide. When it moves in steep places, it has a relatively fixed route, and often tramples a path 16~20 cm wide, but there is no fixed route in gentle places. Generally, men and women are paired together, and their activities are relatively hidden and territorial. They usually move within the scope of the venue and their swimming skills are amazing. Black muntjac often looks for tender grass in the grass in early spring; Living in high-lying forests in summer, often close to shady slopes or water sources, and occasionally going to alpine meadows; In winter, it moves down, and when it snows, it is forced to move down to the farmland near the hillside, mostly on the sunny slope.
Black muntjac has the habit of foraging, foraging back and forth in a certain range until it is full. It mainly feeds on leaves and twigs of herbs, and there are nearly 100 species, including Agaricus blazei Murill, Cephalotaxus Cephalotaxus, Rhododendron, Schisandra sphenanthera, Parthenocissus tricuspidata and so on. Some pieces of meat were found in its stomach, indicating that it can occasionally eat animal food, which is unique among deer.