The invention discloses ecological colorful antibacterial putty powder which comprises the following raw materials in parts by weight: 150-200 parts of heavy calcium carbonate cement, 150-200 parts of white cement, 300-350 parts of coal ash, 50-80 parts of natural color sand, 20-30 parts of a negative ion antibacterial additive, 13-18 parts of redispersible latex powder, 0.1-2 parts of polyacrylonitrile fibers, 0.1-2 parts of hydroxymethyl cellulose and 1-10 parts of inorganic pigment, wherein the negative ion antibacterial additive comprises the following raw materials in parts by weight: 80-120 parts of montmorillonite, 4-10 parts of nano titanium dioxide, 4-10 parts of silver nitrate and 0.1-0.5 part of sodium dodecyl benzene sulfonate. The putty powder is smooth in surface, natural in color, safe and environment-friendly, not only can serve as a base layer leveling material but also can be used for decoration instead of a coating, can continuously release negative ions beneficial to the health of a human body, and also can adsorb harmful impurities and gas and purify air.