Dry ice particle treatment device and dry ice particle treatment method

The invention relates to a treatment device and a treatment method, and discloses a dry ice particle treatment device and a dry ice particle treatment method to solve the problems that the conventional dry ice particles are high in particle diameter and high in destructive power, and can not clean an instrument or an equipment having higher requirement on the accuracy, resulting in a blank of particle cleaning in the dry ice cleaning industry in China. The dry ice particle treatment device comprises an outer housing, a first pipeline, a second pipeline, a third pipeline, a throat pipe and a sieve plate, wherein the first pipeline, the second pipeline and the third pipeline are arranged in the outer housing; one end of the first pipeline is connected with a discharge port of a feeding assembly; the other end of the first pipeline is vertically communicated with one end of the second pipeline; the other end of the second pipeline is vertically communicated with the third pipeline; the throat pipe is arranged in the first pipeline; and the sieve plate is vertically mounted on the second pipeline in an inserting manner. The dry ice particle treatment method comprises the steps of setting a position of the outer housing, conveying materials, carrying out four times of crushing, and outputting the particles. The dry ice particle treatment device and the dry ice particle treatment method are applied to the crushing treatment of the dry ice particles.