Wetlands have important functions and values in flood control and disaster mitigation, water resource regulation, mitigation of environmental pollution, protection of biodiversity, and maintenance of regional ecological environment. As one of the wetland systems in the northern plain of China, the Baiyangdian basin wetlands play a key role in safeguarding the water resources security and good ecological environment in Xiong'an New Area. It is of great significance to understand the current status of wetland ecosystem in the Baiyangdian basin for the construction of new area and future scientific planning. Based on the 10-meter resolution Sentinel-2B image provided by the European Space Agency in September 2017 as main data source, and combined with Google earth high-resolution satellite image (resolution 0.23m), this paper has drawn the latest wetland ecosystem network distribution map of Baiyangdian basin using manual visual interpretation and automatic machine classification. On this basis, the connectivity of Baiyangdian basin wetland (including hydrological connectivity and landscape connectivity) was analyzed with GIS (Geographic Information System). The results show that:(1) In 2017, the wetland area of Baiyangdian basin was 4596.6km², including marshes, floodplains, irrigation canals, lakes, and rivers. Those wetlands mainly distributed in flat areas with a slope of 0° to 2° and an altitude of 100m or less. The area of non-wetland in the basin accounted for about 86%, mainly cultivated land and forestland. (2) In 2017, the length of the river courses in the Baiyangdian basin was 2440 km, with an area of 514 km², including 177 km² in the mountainous area and 337 km² in the plain area. The river course was obviously occupied, in which the proportion of the cultivated land reached 27%, and the proportion of construction land was about 8%. The proportion of cultivated land within the range of 1km, 2km and 3km on both sides of the river took up 61.77%, 62.53% and 62.63%, respectively. With the increase of distance, the area of wetland decreases and the area of non-wetland increases. (3) As a result of the direct and indirect effects of human activities, the hydrological connectivity of river courses has decreased by one third compared with the level of connectivity when the river courses were undisturbed. (4) From the perspective of the wetland landscape connectivity indicated by SPLIT and DIVISION, the natural wetland in the basin had the worst landscape connectivity, followed by constructed wetlands at the landscape level. At the type level, the marsh type had the worst connectivity, and the connectivity of rivers, irrigation canals and floodplains wetlands was better, and the lake had the best landscape connectivity. In order to guarantee the water security of Baiyangdian basin, restoring and enhancing the connectivity of the wetland network in the basin as a whole will effectively improve the ability of water resources safety and ecological environment protection capacity in the Xiong'an New Area.