Abstract: Abstract: The rapid increases of the garden wastes and the related low resources use efficiency have been paid great attention. In order to reuse the garden wastes, the effects of three treatments on garden wastes was investigated. The garden wastes were treated by aerobic composting, pyrolysis and direct incineration. The carbon and nutrient losses, the greenhouse gas emissions, and the effects of corresponding products on the physical and chemical properties of soil were investigated. Incineration was carried out in a closed greenhouse. Muffle furnace under 400 ℃ was used to pyrolysis. Garden waste composting was performed for 29 days using a 60 L composting vessels. A pot-scale test with white clover was carried out to investigate the physical and chemical properties of soil under different treatments of garden wastes. The results showed that the organic carbon loss rate of the garden wastes was 98.62% under the incineration, which was 39.77% and 41.64% higher than that under the aerobic composting and pyrolysis, respectively. The total nitrogen loss rate of wastes was 95.51% under the incineration, which was higher than that under the aerobic composting (22.72%) and pyrolysis (36.65%) respectively. There were no significant differences for the total phosphorus and total potassium loss rates among the three garden wastes treatments. The CO2 emission of incineration was 1271.62 g/kg, which was much higher than that of the aerobic composting with the value of 210.71 g/kg, but both the CH4 and N2O emissions were relatively low under these two treatments. Generally, both the compost and biochar returning to soil significantly improved the structure of soil aggregates with diameter 0.25-0.053 mm and increased the content of N, P and K; which also improved water permeability. Both of them improved capillary porosity and saturated hydraulic conductivity of the soil, and the effect of compost was better than biochar. Further more, biochar significantly increased the content of soil organic carbon. Aerobic composting is an ideal way to improve soil porosity and decrease pH of the soil. However, the incineration ash return to the soil mainly improved the soil P, K nutrient contents and large particle size aggregates with diameter >0.053 mm, the other effects were not significant. In summary, pyrolysis and aerobic composting are suitable ways for the treatments of garden waste, which provides reference for the better utilization of the resources of the garden wastes.