TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparing the flame resistant sound panel involves: (1) preparing flame resistant polymer: adding methyl methylacrylate, flame retardant, UV absorbent and hindered amine light stabilizer in sealed container with stirrer by given ratio, adding 0.001-0.006% initiator, heating to 80-105 degrees C, reacting at constant temperature for 0.5-2 hours, when viscosity of the liquid is 100-500 centipoise, cooling fast, when temperature is 25-35 degrees C, adding 0.006-0.024% initiator, stirring for 15-30 minutes, filtering in vacuum and removing bubbles; (2) surface treatment of plastic supporting structure: equipping three phi 4 mm air nozzles in a sealed box by 120 degrees , where centers of the air nozzles point at center line of the plastic supporting structure and distances between the air nozzles and the structure are the same which is 2-20 mm; spraying hard sands under 0.4-0.8 Mpa to roughen the surface of the structure, pulling out the structure by 3-8 m/minute, washing by water, airing until water content is not greater than 0.3%; (3) grinding model, polishing, washing, qualifying, overlapping working faces of two models, fixing several plastic supporting structures between the models by same distances; (4) injecting the polymer formed in (1) in the model, reacting at 45-65 degrees C for 15-20 hours, and treating by heated air circulation at 100-130 degrees C for 2-4 hours. Preferred Components: Flame retardant is phosphate flame retardant, dimethyl methylphosphate, tri( beta -chloroethyl) phosphate, tritoluene phosphate, tri(2-chloropropyl) phosphate, tri(2,3-dichloropropyl) phosphate, triphenyl phosphite, compose phosphorus flame retardant, tri(1,3-dichloro-2-propyl) phosphate, triethyl phosphate, tributyl phosphate, triaryl phosphate, phosphorus-phenyldiisooctyl ester, triphenyl phosphite, toluenediphenyl phosphate, triphenyl phosphate, and/or triisopropylphenyl phosphate. Initiator is benzoyl peroxide, azodiisobutyronitrile, or azo-bis-iso-heptonitrile. UV absorbent is 2-(2'-hydroxyl-5'-methylphenyl) azimino-benzene, 2-(2'-hydroxyl-5'-tertoctylphenyl) azimino-benzene, or 2-hdyroxyl-4-n-octoxybenzophenone. Hindered amine light stabilizer is bis(2,2,6,6-tetramethylpiperidyl) decanedioate, bis(1,2,2,6,6-pentamethyl-4-piperidyl) decanedioate, or poly(1-(2'-hydroxylethyl)-2,2,6,6-tetramethyl-4-hydroxylpiperidyl succinate).    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: Plastic supporting structure is a monodirectional plastic line, multiaxial plastic shuttle, or multiaxial plastic net. INORGANIC CHEMSITRY - Preferred Components: Hard sand is silicon carbide, green carbon, or corundum.