The invention relates to the technical field of unloading and dedusting bulk materials, in particular to dedusting equipment and a dedusting method for a fixed-point unloading movable dumper. The equipment comprises a central control room movable dumper, a feeding groove, a storage bin, a hanger plate, an electromagnet, a lower seat, a guide rod and a telescopic dustproof cover, wherein an automatic control system, a dumper encoder, two frequency conversion driving devices, two driving wheels with reverse taper directions, a feeding groove encoder, a level gage, a dustproof cover on the upper side of the feeding groove, an outer barrel in an inverted funnel shape, an inner barrel in a funnel shape, and rigid sealing strips are arranged in the movable dumper. The dedusting method comprises the following steps that: a central control room operates the movable dumper to move, align, stop, unload and move away through the automatic control system on the movable dumper according to information transmitted by the level gage in each storage bin. Through the invention, energy is saved and emission is reduced when the movable dumper unloads materials, automatic control is convenient to realize, the working efficiency of the equipment is improved, the working environment of a worker is improved, and investment is saved.