Aerogel composite board and preparation method thereof

The invention relates to an aerogel composite board and a preparation method thereof. The preparation method comprises the following steps: preparing sol by adopting an inorganic silicon source; preparing gel particles by adopting an organic silicon source; mixing the gel particles, the first reinforced fibers, the inorganic particles and the sol to prepare a mixed glue solution; coating the first base layer with the mixed glue solution to form a glue solution layer; laying second reinforcing fibers on the glue solution layer to form a fiber layer; arranging a second base layer on the fiber layer to obtain a middle plate; and carrying out aging treatment and drying treatment on the intermediate board to prepare the aerogel composite board. According to the preparation method, the sol, the gel particles, the first reinforced fibers, the inorganic particles, the second reinforced fibers, the first base layer and the second base layer cooperate with one another, so that the mechanical property of the obtained ae