The invention relates to a use method of a drying device for a clammy ore product sample. The use method comprises following steps of: starting a cycloidal reducer, opening a barrel cover and adding ato-be-tested clammy ore product sample to a stainless steel inner cylinder; closing the barrel cover, starting a dehumidifying fan, a heating fan and a heater, pushing, by a spiral auger, the sampleto an agitating rod to agitate, sending hot air into the sample by the heating fan, pumping out moisture in the stainless steel inner cylinder by the dehumidifying fan, and blowing, by the heater, moisture into the sample in the stainless steel inner cylinder to dry and agitate; starting a motor, turning off the heater, and reversely starting the cycloidal reducer, and pushing mixed material to aposition of a square discharge port I by the spiral auger; turning a handwheel, extracting an insertion board from an insertion board port, and discharging the sample into an auger assembly dischargetube; and driving, by the motor, auger blades with shafts to roughly crush the entering sample and transfer the roughly crushed sample to a crusher feed port of a next procedure. The method realizes an integrated structure with functions of agitating, drying, and crushing, and realizes complete automation.