The invention discloses a preparation method of polyputty used for wood furniture, the polyputty is composed of a main agent and a curing agent. The main agent is composed of unsaturated polyester resin, styrene, triallyl phosphate, bentonite, white alundum, gas phase SiO2, attapulgite clay, hydroquinones, copper naphthenate, dimethylaniline, titanium dioxide and cobaltous naphthenate; the curing agent is composed of cyclohexanone peroxide, gas phase SiO2, titanium dioxide and polyvinylpyrrolidone; the preparation method comprises the following steps: the main agent production, curing agent preparation, putty preparation and the like. The polyputty has the advantages of good application property, fine putty membrane, smoothness, flattening, good flexibility and shrinkage resistance, and enable a matching usage with various mainstream wood paints such as acrylic acid, nitro, polyester, polyurethane and the like in market.