The invention mainly relates to the technical field of joint mixture processing,and discloses an antibacterial and environment-protection building joint mixture. The joint mixture is prepared from,a water-based acrylic resin,natural latex,a starch glue,waste porcelain powder,nano eggshell powder,nail sodium silicate,a polycarboxylate water reducer,zinc sulfate,nano titanium dioxide and tourmalineanion powder; the antibacterial and environment-protection building joint mixture is green and environment-protection,does not contain toxic reagents,does not emit irritating odor,and can effectivelyinhibit bacteria and mildew,the inhibition rate reaches 93.7%,and the aesthetics and durability of a building are maintained; the water-based acrylic resin and the natural latex are mixed and slowly stirred to avoid bubble generation,the flow state of the joint mixture is maintained,convenience is provided for extrusion and seam filling during use,the mixture is tightly combined with a seam,the addition of the zinc sulfate can increase the viscosity of the joint mixture,the joint mixture is made in close contact with tiles,marbles and wood products,the antibacterial activity of the joint mixture is improved,and mildew and discoloration of the joint mixture are avoided.