Abstract: Based on the data of river network of the Southern Jing river in different period from 1955 to 2016, the changing process of river network connectivity was studied from three aspects: strength of river system and hydraulic connectivity, river network connectivity and level of river network connection. Results show that comparing with 1955, in 2016, (1) the hydrological connectivity demonstrated a decrease trend but with moderate changes; (2) the circuitry of river network connectivity α, node-connection rate β, and river network connectivity γ were all decreased by 45.45%, 10.80% and 8.46%, respectively, of which the node-connection rate β demonstrated the most significant trend; (3) based on two methods evaluating the river network connectivity (e.g. ① E: river network connectivity with respect to the natural and social functions of river network, and ② F: river network connectivity with respect to the hydrological process and flow resistance) the river network connectivity of the three outlets of Southern Jing river has been collectively evaluated. Both of the results derived from the two individual method show that river network connectivity in the study area presented a downtrend that decreased from 0.2367 and 0.3434 in 1955 to 0.1588 and 0.2517 in 2016, respectively. The results of this article could be theoretical references for both river network or lake connectivity recovery projects and riverine ecological system restoration.