Maintaining the ecological security of agricultural space is an important goal of comprehensive land remediation and ecological restoration. The semi-natural habitats (SNHs) in the transitional zone between natural and artificial habitats can be called "shared space", which are formed under the strong interaction of natural elements and artificial elements. SNHs have ecological assemblages which have been substantially modified in their composition, balance or function by human activities. They have evolved through traditional agricultural, pastoral or other human activities and depended on their continuation to retain their characteristic composition, structure and function. Despite not being natural, these habitats and ecosystems often have the characteristics of diversification of resource types, complex landscape pattern and diversification of ecological functions, providing high value in terms of biodiversity and other ecosystem services. There is no gainsaying that it is a key area to ensure and improve the ecosystem health of agricultural space. By analyzing the connotation and characteristics of SNHs, taking Luojiang District of Sichuan Province as an example, the SNHs in agricultural space were identified from the perspective of pattern. The results showed that:(1) the proportion of SNHs in Luojiang District was 27.28%, mainly concentrated in the mixed agricultural and forestry areas, followed by the urban and rural areas. The agricultural concentration areas had a relatively low proportion of SNHs, and there had problems such as small habitat area, fragmented patches, and blocked connectivity. (2) The proportion of ecological SNHs was 17.28%, that was mainly distributed in the fringes of agricultural concentration areas. And the proportion of artificial SNHs was 10.00%, which was mainly distributed in the surrounding areas of large residential areas and in mountainous areas with mixed land use. (3) From the perspective of overall space, the region formed a gradual distribution pattern of agricultural concentration areas-ecological SNHs-artificial SNHs-artificial habitats or natural habitats. And the landscape pattern could be summarized as four patterns of "sheet core-environmental screen-corridor-patch". (4) In the new era of territorial space planning, the research on semi-natural habitats in agricultural space needs to link urban space and ecological space to achieve systematic protection and restoration, so as to provide adaptability for the management and control of territorial space under the constraints of China's current national policy of food security and ecological civilization construction strategy.