Abstract: Taking the female Nomascus leucogenys and her young in Hongshan Forest Zoo in Nanjing as the research object, the behavior observation and feeding management data of the female Nomascus leucogenys before and after lactation were collected by using the method of full event recording, and the behavior status of the mother and mother of the female Nomascus leucogenys before and after lactation in artificial feeding conditions was obtained, hoping to provide reference experience for the feeding management of other zoos.