The invention discloses putty powder.The putty powder is made from, by weight, talcum powder, triple superphosphate, gypsum, bentonite, cellulose, starch glue, a lubricating agent, sierozem, aromatic, high-gluten flour, straw, bamboo residues, dracaena marginata, bamboo charcoal granule fatty alcohol-polyoxyethylene ether, pure water, magnetized water, a leavening agent, konjaku flour, a ferrous sulfate solution and pigment.The invention further provides a preparing method of the putty powder.Straw, bamboo residues and dracaena marginata are introduced into the raw materials, the putty powder is environmentally friendly and capable of improving indoor air quality, straw and bamboo residues are of a fiber porous structure and can absorb harmful gas in the air, and dracaena marginata can effectively absorb formaldehyde in the air and effectively improve air quality.