The invention discloses a method for cleaning sticky slag at the bottom of a ladle. It includes converter smelting billet rebar, the end point temperature is controlled at ≥ 1630°C, and the end point carbon content is controlled at 0.06% to 0.15%; the steel ladle to be processed is transported to the converter tapping position, and fluorite and silicon carbide are added to the bottom of the ladle. Tapping; during the tapping process of the converter, carbon powder and silicon-manganese alloy are added to control the composition of molten steel: C≥0.2%; Si: 0.2%-0.6%; Mn: 1.2%-1.5%; Alt≤0.0030%; After steel, the ladle is transported to the argon blowing station for argon blowing, and the composition of molten steel top slag is controlled: CaO: 35% ~ 40%, SiO 2 :30%~35%,Al 2 o 3 ≤10%, MgO≤10%; pour out after the argon station leaves the station, the pouring process temperature is ≥1520°C, pour out the pouring slag after casting. The invention aims at the problem that after the slab aluminum-killed molten steel is cast, the bottom of the ladle is more precipitated due to the deposition of high-melting point substances, and provides a method for cleaning the sticky slag at the bottom of the ladle, and the cleaned ladle restores its serviceability, and the method The effect is remarkable, the operation is convenient, and the cost is not increased.