The invention relates to an intelligent construction waste classification device. Each floor is provided with a floor waste opening, every two adjacent floor waste openings are connected through a transport passage, the lower part of the lowermost floor waste opening or transport passage is provided with a construction waste transport passage and a decoration waste transport passage, an electric baffle device is arranged between the construction waste transport passage and the decoration waste transport passage, the lower part of the construction waste transport passage is provided with a particle separation passage, and the lower parts of the particle separation passage and the decoration waste transport passage are provided with mobile waste collection carts. The intelligent constructionwaste classification device is ingenious in concept, simple in structure and high practicality, achieves the function of automatically and efficiently classifying construction waste based on stages,types and particle sizes with the powerful intelligent classification capacity, and also has good noise reduction, dust suppression and safety protection effects.