Wind fields in urban open space not only affect the "wind sense" comfort of the micro-environment, but also the urban climate at the macro-scale. From the perspective of Landsenses Ecology, this paper first expounds the definition of "wind sense" and summarizes the basic principles and characteristics of street canyon wind fields. Kestrel NK4500 hand-held weather stations are used to measure the wind environment of urban open space. The CFD (Computational Fluid Dynamics) simulation software, Fluent 14.0, is used to simulate the wind environment in the same space without the green space. The measurement and CFD simulation results are compared to study the actual interference of green space on wind fields at pedestrian height in compact urban open space. It has been found that the "wind sense" of compact urban open space is influenced by the spatial layout of both buildings and green space. When the buildings are higher than the green space, the wind field is dominated by the buildings; when the tree belts are higher than the buildings, the degree of influence on the wind environment is affected by of the tree belts' density. An evergreen forest belt with high density has a profound influence on wind direction and wind speed, whereas a forest belt with low density affects wind speed, but has little effect on wind direction. The main factor affecting wind speed is the air domain formed by space enclosure. Compared with solid and porous media, the air domain has considerably lower resistance to the wind. Particularly, ventilation corridors above paving and lawns are the key factors affecting ventilation at pedestrian height level. The compact green space at pedestrian height should be kept open to ensure ground ventilation, and air circulation should be promoted by systematically establishing horizontal and vertical ventilation corridors.