The utility model relates to a micron-sized ice particle preparation device which is characterized by comprising a water inlet pipeline, an atomizing nozzle, an ice particle generation chamber, an air inlet pipeline and a nitrogen nozzle, wherein an outlet end of the water inlet pipeline is connected with the atomizing nozzle; the atomizing nozzle is arranged at the inner side of the upper part of the ice particle generation chamber; the outlet end of the water inlet pipeline is connected with the nitrogen nozzle; the nitrogen nozzle is arranged at the inner side of the lower part of the ice particle generation chamber; the nitrogen nozzle and the atomizing nozzle are arranged on the same straight line; the jet directions of the two nozzles are opposite to each other. The micron-sized ice particle preparation device is capable of accurately controlling the particle size of mist formed by water, so that the purity of the generated ice is guaranteed; the micron-sized ice particle preparation device reaches the experimental requirements, and can be widely applied to an experiment of producing hydrate by ice.