New Julong fat coal is a high-quality coking coal resource, but due to oxidation, the surface oxygen-containing functional groups increase significantly and the hydrophobicity decreases, resulting in deterioration of flotation dynamics and serious loss of refined coal. In this paper, the mineral composition and surface chemical properties of oxidized raw coal were analyzed by XRD, XRF, XPS, etc., and the oxidation characteristics of polar groups such as C-O/C=O were revealed, and the content of hydrophilic minerals such as kaolinite and quartz was high. The infrared spectroscopy after high shear slurry conditioning showed that the absorption peak of oxygen-containing functional groups was significantly weakened, and the high-shear slurry adjustment could effectively clean the oxide layer and fine mud cover on the surface of coal particles, and improve the dispersion and adsorption of the agent. The flotation kinetics analysis showed that the ultimate recovery rate ε∞ increased from 55.12% to 62.61%, and the k value increased from 1.52 to 1.57, which significantly improved the flotation kinetics of oxidized coal．