Abstract: Soil seed bank refers to all seeds that are alive in the soil and on the surface of the soil, which plays an important role in the process of vegetation renewal, vegetation restoration, and propagation and diffusion of plant species. To study the unclear relationship among the characteristics of soil seed bank, plant diversity, physical and chemical properties of different soil types of coniferous and broad-leaved mixed forest communities, Shangri-la subalpine forest zone was chosen as the research objects, including Rocky Desertification Grassland, grassland, shrub land, sparse and shrub land by deforestation and overgrazing. The relationship among aboveground vegetation, soil physical and chemical properties were analyzed to provide data support for vegetation restoration of subalpine degraded forest ecosystem. The results show that: ① The diversity of soil seed banks and above-ground plants from different communities was very low, the species were mainly perennial plants; the average density of soil seed banks of four community types was 700.5 ± 215.5 grains/m², indicating that there were fewer plants in the soil seed bank for species germination and growth. ② There were significant differences in soil pH, organic matter, hydrolytic nitrogen, total phosphorus, total potassium and total nitrogen among the four types of degraded communities. The shrubby forest community had the best soil condition, while the stony desertification grassland was the worst. ③ The species diversity of soil seed bank is positively correlated with the above-ground vegetation diversity and negatively correlated with the soil physical and chemical properties; the effects of soil total nitrogen, pH, organic matter, and Patrick richness index on the soil seed bank species are relatively high, available phosphorus, available potassium and total phosphorus show the least impact on the species diversity of soil seed bank. ④ In general, the soil conditions of the four community types are good, and the plant diversity is poor. Human disturbance (cutting, overgrazing, etc.) is the main factor leading to forest degradation.