Taking 70 rail transit stations from the Third Ring Road to the Fourth Ring Road in Beijing as samples, this paper analyzed the continuity of the walking space around the stations from two aspects: the integrity of the walking network at the macro level and the smoothness of the walking path at the micro level. The dominant problems and influencing factors were explored by means of satellite map observation, map marking and field survey. The results show that: the overall degree of pedestrian network around stations in Beijing urban area is mainly affected by main roads, expressways and viaducts, followed by rivers and railways, but their cutting effect is far greater than that of urban roads. A small number of stations are affected by elevated rail transit lines, resulting in the failure of effective integration of ground and ground space around the entrance and exit. From the perspective of time and space barrier, the environmental factors affecting the smoothness of pedestrian path are mainly reflected in three aspects: the connectivity of crossing facilities, the time blocking effect of grade intersections and the dual guidance of buildings (structures). In order to realize the pedestrian accessibility of subway passengers from the exit to the destination, this paper put forward some suggestions on the construction of smooth and continuous walking space from the aspects of track line and site selection, station entrance and exit space design, space environment elements and policy guidance.