The invention discloses a cooling solidification recycling method for a high-temperature liquid-state slag in a steelmaking furnace. The method comprises the following steps of: remaining slag, namely performing slag remaining operation after tapping, wherein the slag remaining amount in a converter is 5 to 40t; adding a coolant into residual slag according to the content of end point carbon in the converter and the slag remaining amount after the tapping, wherein the coolant comprises 1 to 3.0t of lime, 0 to 3.0t of magnesium carbon ball and 0.2 to 3.0t of dolomite; splashing the slag, namely splashing the slag and jetting N2 by using a gun under the pressure of between 1.2 and 1.5MPa at the temperature of between 25 and 35 DEG C for 3 to 7min, wherein the flow is 30,000 to 50,000Nm<3> / h; after the slag splashing is finished, lifting the gun, shaking the furnace to observe a slag splashing effect that whether the slag is solidified or not, and adding scrap steel together with iron after the high-temperature liquid-state slag in the furnace is cooled and solidified; and otherwise, adding 0 to 3.0t of coolant into the converter, wherein the coolant is lime. In the method, a tapping and slag remaining process, a slag splashing and furnace protecting process and a coolant adding process are combined, and the high-temperature liquid-state slag is recycled; and the slag is simply and effectively recycled, so that a good steel slag reaction condition is provided for subsequent smelting of the converter.