The invention discloses a wood veneer dyeing method. The wood veneer dyeing method includes the following steps: a coupling agent A, a small amount of sodium hydroxide and ethanol are blended into paste, a small amount of boiling water is added, stirring is conducted to enable a mixture to be dissolved, then remaining sodium hydroxide and water are added to prepare pre-treatment liquid, then an appropriate amount of inorganic salt is added, and even stirring is conducted; to-be-dyed veneers are dipped in the pre-treatment liquid, the bath ratio is 1:(15 to 20), an appropriate quantity of wetting agent is added, ultrasonic treatment is conducted for 30-180 min at 30-60 DEG C, and wood plates are taken out; a color developing agent B is dissolved in an inorganic acid solution, cooling is conducted to 0-10 DEG C through ice, sodium nitrite is gradually added under stirring, and a stirring reaction is conducted for 1-30 min at 1-10 DEG C; and the pre-treated wood plates are dipped in a color developing agent solution, the bath ratio is 1:(15 to 20), the temperature is increased to 10-20 DEG C, the pH value is adjusted to 5 to 8, dyeing is conducted for 10-120 min, and the wood plates are taken out and aired. The dyeing method is easy to operate and industrialize, the wood veneers can be dyed into the color of valuable timber, and the additional value of the wood veneers is increased.