The invention belongs to the technical field of preservatives, and particularly relates to a wood
preservative. According to the wood
preservative, first of all,
sodium periodate is added and stirred after
corn starch and water are mixed; after the PH value is adjusted, reaction is conducted through heat preservation and stirring, and then a reactant is mixed with
acetone and filtered,
modified starch is obtained after filter residue is dried; then
cocamidopropyl dimethylamine oxide, triadimenol, isopropanol and the like are stirred and then mixed with deionized water to form oil-in-water type
emulsion; after being dissolved by the deionized water, the
modified starch is mixed with wood vinegar,
natamycin and the like to obtain a biological
antibacterial agent solution; and finally the biological
antibacterial agent solution and the oil-in-water type
emulsion are blended and injected packaged at equal proportions, and thus the wood
preservative can be obtained. The prepared wood preservative has good effects of being
mildew-proofing,
insect-proofing and
corrosion-proofing, and meanwhile is green and
environmentally friendly, cannot make any damage on the environment and human bodies after being used, and is good in
corrosion-proofing effect and long in prevention effect and has wide application prospects.