The invention discloses a starch-containing biomass plastic doors and windows. The starch-containing biomass plastic doors and windows are prepared from the following raw materials in parts by weight: 2 to 3 parts of pregelatinized starch, 1 to 2 parts of diazolidinyl urea, 61 to 70 parts of 20 to 30 percent sodium hydroxide solution, 2 to 4 parts of sodium potassium silicate, 30 to 41 parts of dimethyl carbonate, 2 to 3 parts of op-10, 20 to 30 parts of n-butyl acrylate, 0.4 to 0.6 part of ammonium persulfate, 60 to 70 parts of vinyl acetate, 36 to 40 parts of benzyl chloride, 400 to 430 parts of polyvinyl chloride, 6 to 10 parts of sisal fibres, 1 to 2 parts of triterpenoid saponin, 20 to 30 parts of wollastonite powder, 6 to 10 parts of di(2-ethylhexyl)-4,5-epoxytetrahydrophthalate, 1 to 2 parts of calcium fluoride, 30 to 38 parts of nano-diatomite and 1 to 2 parts of polycarbodiimide. According to the starch-containing biomass plastic doors and windows, the plasticizing capacity of a substrate can be effectively improved; the hardness and the wear resistance of a finished product can be improved; the impact strength, the toughness and the size stability of a finished material can also be improved.