The present invention discloses a modified foaming cement board, wherein the raw materials comprise a ordinary silicate cement, fly ash, hydrogen peroxide, bis(pentabromophenyl) ethane, a sulfonated acetone formaldehyde polycondensate, a multi-component copolymer dispersing agent, polyurethane, a foam stabilizer, a coupling agent, alkali-resistant fibers, bis(2,2,6,6,-tetramethyl-4-piperidyl)sebacate, 2-hydroxy-4-methoxy benzophenone, and an ultraviolet ray absorber. The modified foaming cement board has the following characteristics that the thermal insulation property is good, the product dry density is 150-200 kg / m<3>, the thermal conductivity is 0.05-0.06 W / (m*K), and the good thermal-insulation and energy-saving effect is provided; the fire prevention performance is good, the fire resistance limit is more than 3 h, and the material can meet the grade A fire prevention standard so as to provide good fire resistance; the sound insulation performance is good so as to substantially reduce the noise impact; the durability is good, and characteristics of high temperature resistance, low temperature resistance, corrosion resistance, ultraviolet ray radiation resistance, and good weathering resistance are provided; the 1 day strength of the product with the dry density of 170 kg / m<3> can achieve 0.3 mpa, and the 28-day strength can achieve 0.4 mpa; and characteristics of early strength and high strength are provided, and problems of high brittleness and easy damage are overcome.