The invention discloses a turbine rapid cooling method. The turbine rapid cooling method comprises the following steps that S1, after a turboset electric generator and a power grid are split, the no-load state is kept; S2, in the no-load period, steam obtained after high-pressure control valve throttling cools a high pressure cylinder and a rotor of a turboset; S3, after gate starting and halting to the preset highest-gear jigger rotating speed is carried out, the preset highest-gear jigger rotating speed is kept within a preset time; and S4, a trap of the high pressure cylinder is opened, the high pressure cylinder and a condenser are communicated, and cooling of the high pressure cylinder and the rotor is promoted until the temperature of the high pressure cylinder and the rotor is decreased to 100 DEG C or below. By means of the turbine rapid cooling method, the cooling time is greatly shortened and is shortened by at least 5 days compared with original halting time, time is saved for the condition that the turboset enters overhauling or fault processing in advance, convenience is brought to the condition that the turboset enters overhauling or fault processing in advance, and the huge economic benefit is created for a power plant.