Dust removal vehicle for tunnel construction and dust removal method thereof

The dust removal vehicle for tunnel construction comprises a dust removal vehicle body, a dust removal bin and a supporting column, the dust removal bin is arranged at the top of the dust removal vehicle body, the supporting column is arranged at the top of the dust removal vehicle body, a first motor is mounted at the bottom of a mounting plate, and a first threaded rod is sleeved with a limiting block; an adjusting column is mounted at the top of the limiting block, and an electric rotating disc is mounted at the top end of the adjusting column. An electric rotating disc is installed at the top end of an adjusting column, a first motor operates to drive a first threaded rod to rotate, the first threaded rod rotates to drive a limiting block to stably move on the inner side of a limiting groove to achieve position adjustment of the electric rotating disc in the vertical direction, and the electric rotating disc operates to drive a gun fog machine to rotate to achieve adjustment of the use angle of the gun fo