Abstract: Mechanical stirring during the flotation conditioning process is a commonly employed and efficient method to enhance the effectiveness of slurry conditioning. However, excessive stirring intensity can lead to the desorption of collectors from the surfaces of coal slurry particles, thereby compromising the conditioning efficacy. Determining the optimal range of stirring intensity to enhance conditioning performance is a pressing challenge. In order to explore the influence of stirring speed on the adsorption rate of coal oil and investigate the desorption behavior of coal oil on the surface of coal slurry, experiments were conducted. Adsorption rates were measured and calculated using a UV spectrophotometer. A self-constructed desorption test apparatus and a high-speed motion capture system were employed to study the contact angle, adsorption area, deformation degree, and the forces acting on adsorbed oil droplets under stirring conditions. The research findings indicate that stirring speed significantly impacts the adsorption rate of coal slurry. With increasing stirring speed, the adsorption rate exhibits three distinct phases: increase, decrease, and stabilization. The maximum adsorption rate of 78.37% is observed at a speed of 800 r/min, highlighting the crucial role of optimal stirring speed in conditioning. Both excessively high and low speeds are detrimental to the conditioning process. As stirring speed increases, the contact angle and contact area of adsorbed oil droplets also increase, leading to an enhanced adsorption effect. Furthermore, the deformation degree of oil droplets increases with rising speed, accompanied by a reduction in stability.