As one of the important contents of ecological agriculture, diversified planting optimizes crop configuration (rotation, intercropping, mixed cropping or mulching crops, etc.) through time and space dimensions, which not only improves the quality of cultivated land and agricultural productivity, but also has a significant impact on greenhouse gas emissions from farmland soil. However, there is no unified conclusion on the response of farmland soil greenhouse gas emissions to diversified planting, especially the understanding of the mechanism of farmland soil greenhouse gas emissions under diversified planting is still limited. Based on this, this paper reviewed the effects and mechanisms of diversified planting on greenhouse gas (CH₄, N₂O) emissions from farmland soils, and the agronomic management measures that affect greenhouse gas emissions from farmland soils under diversified planting. The summary showed that the effect of diversified planting on greenhouse gas emissions from farmland soil mainly varies due to factors such as crop species, planting area, planting years, crop varieties, and nitrogen fertilizer application. Diversified planting affects greenhouse gas emissions by affecting soil microorganisms, crop nitrogen uptake and exogenous nitrogen input, soil respiration, and soil pH; in addition, tillage methods, irrigation management, nitrogen fertilizer application and straw returning affect greenhouse gas emissions from farmland soil through different mechanisms, and agronomic management strategies need to be optimized to promote greenhouse gas emission reduction under diversified planting. Finally, the future research directions were prospected, in order to provide reference for the application of diversified planting in farmland soil carbon sequestration and emission reduction.