The invention discloses an ice making device. The ice making device comprises a watering tank and a watering tank cavity arranged in the watering tank, and the right side of the watering tank is fixedly connected with a gas injection tank which communicates with the watering tank and is provided with an upward opening; a gas injection tank cavity is formed in the gas injection tank; a recovery tank is fixedly connected to the right side of the gas injection tank; a recovery tank cavity is arranged in the recovery tank; a watering mechanism is arranged in a water inlet; the watering mechanism is used for uniformly spraying water on the ground of an ice field; an ice making mechanism connected with the watering mechanism is arranged in the gas injection tank cavity; the ice making mechanismmoves along with the watering mechanism and has a certain delay property, and is used for rapidly condensing water which is spread on the ground by the watering mechanism into ice; and an ice flattening mechanism is arranged in the recovery tank cavity. The ice making device can be used for quickly preparing a flat ice surface on the ground, and therefore the secondary ice making process of the ice surface is facilitated and the safety of the ice field can be guaranteed advantageously.