The invention relates to a waterproof polyurethane coating for woodware, which comprises the following components in parts by weight: 25 parts of polyurethane emulsion, 12 parts of bentonite, 5 parts of urea-formaldehyde resin, 6 parts of silicon dioxide, 5 parts of ethanol, 8 parts of epoxy resin, 4 parts of polyvinyl alcohol, 2 parts of formaldehyde, 2 parts of magnesium sulfate, 23 parts of talcum powder, 2 parts of a flame retardant, 12 parts of titanium dioxide, and 3 parts of a defoaming agent. Compared with the prior art, the waterproof polyurethane coating for woodware has good elasticity, low temperature flexibility, aging resistance, and no flowability at high temperature, and therefore, the quality of products can be improved, and the using temperature range of products can be expanded.