The invention relates to the field of building decoration equipment, in particular to a high-efficiency spraying device for a rotating material-guiding type building decoration plate, comprising a horizontally arranged support and installation plate, the upper end of the support and installation plate is vertically arranged with a support and installation cylinder, and the lower half of the support and installation cylinder is vertically arranged. There are rotating gates on both sides of the section, the middle position of the upper end of the supporting installation cylinder is vertically arranged with a spraying installation cylinder, and the lower half of the spraying installation cylinder is horizontally provided with a conical surface deflector. There is a concave installation tube concave downward, and the device can have a good material spraying connection ability through the steering, clamping and guiding and rotating and turning over the structure, which reduces the interval of continuous spraying of the plate, improves the efficiency of spraying, and makes the spraying more uniform. The unique paint diversion structure, combined with passive rotating painting, makes the painting of the device uniform, and the addition of the battery significantly improves the independent operation ability of the device and improves the practicability of the device.