Dust removal device for building construction

According to the dust removal device for building construction, a dust removal box is arranged on a mounting platform, and a dust removal cavity, a water storage cavity and a dirt storage cavity are formed in the dust removal box; the dust collection mechanism is arranged on the dust removal box; the spraying mechanism is rotationally arranged in the dust removal cavity, the spraying mechanism can suck clean water in the water storage cavity and spray the clean water to air sucked by the dust suction mechanism, and leached dirt is stored in the dirt storage cavity; the sewage discharge mechanism is locally arranged in the dust removal box, the sewage discharge mechanism can convey and filter sewage, filtered water is guided into the water storage cavity, and the filtered sewage is discharged. By arranging the dust removal box and the dust suction mechanism, the dust suction mechanism can suck indoor air mixed with dust into the dust removal box, then by arranging the spraying mechanism, the spraying mechanism