The invention relates to liquid material adding equipment used for road construction, in particular to grouting equipment applicable to semi flexible pavement construction. The grouting equipment comprises a vehicle frame provided with walking wheels, and the vehicle frame is provided with a slurry storage box and a vacuum pump; the bottom of the slurry storage box is provided with an opening and is close to the pavement; an inlet of the vacuum pump is formed in the slurry storage box and is close to the pavement below the slurry storage box; the end face of the inlet of the vacuum pump is provided with an annular sealing pad, and the sealing pad is tightly attached to the road surface; an outlet of the vacuum pump is communicated with the slurry storage box. According to the grouting equipment, the grouting process is improved to a certain degree, the design requirement of grouting materials is lowered, the grouting equipment has the advantage of being high in grouting speed and high in continuous operation capacity, defects in the pavement materials are reduced, and the comprehensive performance of semi flexible pavement is improved.