Abstract: Including grass species in orchards is an advanced technology to manage soil, thereby promoting sustainable fruit production. It has been 40 years since this technology was introduced into China, and researchers have paid much attention to the changes in microclimate, soil features, and fruit production in orchard-grass systems. However, little attention has been paid to the patterns of orchard-grass systems and how they affect the distribution of resources. This paper summarizes some typical patterns of including grass species in Chinese orchards, and describes how they work under different conditions. The effects of including grasses in the orchard on soil water and fertility, light radiation, and pests and weeds are discussed. There are multiple patterns of orchard-grass systems, with different types and proportions of grass species that affect the moisture content and fertility within the system. Suitable patterns of orchard-grass systems may increase water infiltration into the soil, reduce water evaporation, and reduce soil erosion. They can also help to increase soil fertility and enhance the activity of beneficial soil microorganisms. These patterns can enhance the interception of light radiation and improve the light environment beneath the trees. Additionally, including grass species may help to enhance the resistance of the orchard-grass system to pests and weeds. These advantages have great potential to diversify the outcomes of orchards and to improve their quality. However, unsuitable combinations of orchard and grass species, and/or inappropriate sowing methods can lead to competition for water and nutrients in soils and worsen the deficit of those resources, leading to negative effects on production. The information summarized in this review will help to improve research on orchard-grass systems and the use of appropriate planting patterns in Chinese orchards.