A putty powder for wall is prepared from carboxymethyl cellulose sodium (Cmc) (0.05-10%), bentonite (5-20%), white cemet (5-20%), gypsum powder (5-20%), lime calcium powder (5-20%), quartz stone powder (5-20%), wollastonite powder (30-60%) and talc powder (5-20%). Its advantages are low cost and no poison.