Mounting method of light-weight wall boards

The invention discloses a mounting method of light-weight wall boards. The method comprises the following steps: butting grooves in seams of the light-weight wall boards; filling the seams with interface treating mortar; after the mortar is dry, forming a first through hole for grouting and a second through hole for ventilation in each seam in a drilling manner, wherein each first through hole and the corresponding second through hole are in up-and-down arrangement; pouring grouting mortar in the seams through the first through holes, and when the full grouting mortar is discharged from the second through holes, enclosing the second through holes; continuing pouring the grouting mortar in the seams through the first through holes till the grouting mortar overflows from the first through holes; and enclosing the first through holes. Through the adoption of the method disclosed by the invention, the influence of human factors of operating personnel can be reduced, so that the mortar at the seams is full; the dry operation can be realized during mounting the wall boards, so that the mounting efficiency is improved; the phenomena that a wall body has cracks, water seeps in the wall body, and the like can be effectively avoided, and the impact resistance of the wall body is improved.