The invention relates to the field of haze prevention and control, in particular to a portable dust removing device which comprises a shell body. An air inlet pipe is communicated with the lower portion of the shell body. The upper portion of the shell body is communicated with a face mask through a connecting pipe. Liquid is arranged in the shell body. A gaseous phase labyrinth is arranged in a shell body inner cavity. The gaseous phase labyrinth is provided with an adsorption layer at least on a windward face. The arranged gaseous phase labyrinth is matched with the adsorption layer, the gaseous phase labyrinth lengthens an air path, meanwhile, air is turned by multiple times, through centrifugal force generated by turning, dust in air is in contact with the adsorption layer and is adsorbed by the adsorption layer, and accordingly dust and small particles in air are reduced. The principles are different from a filtering principle and a spraying principle in the prior art, compared with the filtering principle, the portable dust removing device is small in respiratory resistance, normal respiration can hardly be affected, by replacing liquid in the shell body, sediment is discharged, continues using can be achieved, using cost is low, and environment pollution can be avoided. Compared with the spraying principle, a power supply and a pump are of no need, using cost is lowered, and noise is removed.