The bottom‐blowing enhanced smelting technology has been widely used in a variety of metallurgical processes because of its significant advantages of high melting strength, easy operation and low cost. The bottom‐blowing spray lance is its key equipment. In this paper, the multi‐channel spray lance is used as the research object, the numerical simulation method is used to establish a three‐dimensional mathematical model of the multi‐channel bottom‐blowing spray lance stirring, and the numerical simulation results are verified by the hydrodynamic model experiment. According to the simulation and experimental results, the gas‐liquid mixing uniformity in the stirring process of the straight‐pipe spray lance and the multi‐channel spray lance is evaluated by the four methods of LOG edge detection, image entropy, gas content variance and average turbulent kinetic energy. The results show that the multi‐channel spray lance can strengthen the bottom‐blowing stirring and optimize the melt mixing effect, which has achieved good application results in the production practice.