The invention discloses a molding powder reclaiming device and relates to a molding powder reclaiming device applied to paint spraying or plastic spraying of doors. The device comprises a plurality of sets of centrifugal fans and cyclone separators connected with the centrifugal fans, wherein an air outlet of each set of the cyclone separator is connected with an air inlet of a pulse filter. The device overcomes the defects of single use of the cyclone separators and the pulse filter and has the respective advantage of the cyclone separators and the pulse filter by combining the cyclone separators with the pulse filter; and the cyclone separators serving as primary filtering systems filter small particles and part of molding powder, while the pulse filter further performs secondary filtering on the molding powder in air so as to fulfill the aim of completely reclaiming the molding powder. Moreover, a plurality of sets of the devices are arranged in a spraying room; each set of the device corresponds to molding powder of one color for classifying the molding powder of different colors, so that the phenomenon that the molding powder of the different colors is mixed with one another is avoided; the secondary utilization of the molding powder is realized and economic benefits are improved.