The invention relates to a decorative plate material with high doping quantity of fly ash and a production method thereof, which belong to the field of construction materials. The decorative plate material comprises cement, fly ash, polyvinylformal fibre, perlite, meerschaum, pulp, micro silicon powder, glass fibre and polyacrylamide. A right amount of micro silicon powder is added into a formula, the floating of a light material in the wet process can be reduced, the use quantity of the fly ash in the decorative plate material is also enhanced greatly, and the highest doping quantity can reach 40%. The wet process of the conventional asbestos-free cement flat plate is properly improved, and the maintained decorative plate material has the advantages of economy, applicability, flame retardant, light weight, small contraction, environmental protection, heat insulation, moisture prevention and good durability after being sprayed with paint.