A polyalkylene carbonate resin composition for producing a decorating material, comprising: 100 parts by weight of a base resin consisting of 1 to 100 wt% of a polyalkylene carbonate resin and 0 to 99 wt% of a thermoplastic resin; based on the base resin, 0.01 to 20 parts by weight of a compatibilizer including low-molecular weight poly(alkylene)carbonate or poly(alkylene)carbonate copolymer; 1 to 80 parts by weight of a plasticizer, which is one or a mixture of two or more selected from a glycol-based plasticizer, a glycerin-based plasticizer, a neopentyl glycol, diethylene glycol, triethylene glycol, acetylated monoglycerin, epoxidized soybean oil, epoxidized linseed oil, epoxides of other plants, chlorinated hydrocarbon, trimellitate, and a phosphate-base plasticizer; 0.01 to 10 parts by weight of a crosslinking agent, a chain extender, which is one or a mixture of two or more selected from the group consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,10-decanediol, 2,2-dimethyl-1,3-propanediol, 1,3-propanediol, trimethylpropanol, bisphenol, polyesterdiol, polyetherdiol, polycaprolactonediol and polycarbonatediol, or a mixture thereof; 0.01 to 5 parts by weight of a heat stabilizer, which is one or a mixture of two or more selected from the group consisting of phenol-based, hydroquinone-based, benzyl alcohol-based, quinine-based, and amine-based compounds; and 0.001 to 5 parts by weight of a processing aid, which is one or more selected from the group consisting of stearic acid, phosphoric acid; phosphorous acids including 3,5-di-t-butyl-4-hydroxybenzylphosphonic acid; phosphorous acid esters including triphenylphosphate, trimethylphosphate, triisodecylphosphate, and tri-(2,4-di-t-butylphenyl)phosphate; phosphorous compounds including hypophosphorous acid and polyphosphoric acid; and acidic phosphoric acid esters including methylphosphate, dibutylphosphate, and monobutylphosphate. 100 parts by weight of a base resin consisting of 1 to 100 wt% of a polyalkylene carbonate resin and 0 to 99 wt% of a thermoplastic resin; based on the base resin, 0.01 to 20 parts by weight of a compatibilizer including low-molecular weight poly(alkylene)carbonate or poly(alkylene)carbonate copolymer; 1 to 80 parts by weight of a plasticizer, which is one or a mixture of two or more selected from a glycol-based plasticizer, a glycerin-based plasticizer, a neopentyl glycol, diethylene glycol, triethylene glycol, acetylated monoglycerin, epoxidized soybean oil, epoxidized linseed oil, epoxides of other plants, chlorinated hydrocarbon, trimellitate, and a phosphate-base plasticizer; 0.01 to 10 parts by weight of a crosslinking agent, a chain extender, which is one or a mixture of two or more selected from the group consisting of ethylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,10-decanediol, 2,2-dimethyl-1,3-propanediol, 1,3-propanediol, trimethylpropanol, bisphenol, polyesterdiol, polyetherdiol, polycaprolactonediol and polycarbonatediol, or a mixture thereof; 0.01 to 5 parts by weight of a heat stabilizer, which is one or a mixture of two or more selected from the group consisting of phenol-based, hydroquinone-based, benzyl alcohol-based, quinine-based, and amine-based compounds; and 0.001 to 5 parts by weight of a processing aid, which is one or more selected from the group consisting of stearic acid, phosphoric acid; phosphorous acids including 3,5-di-t-butyl-4-hydroxybenzylphosphonic acid; phosphorous acid esters including triphenylphosphate, trimethylphosphate, triisodecylphosphate, and tri-(2,4-di-t-butylphenyl)phosphate; phosphorous compounds including hypophosphorous acid and polyphosphoric acid; and acidic phosphoric acid esters including methylphosphate, dibutylphosphate, and monobutylphosphate.