The invention discloses a method for promoting beta-menadione production through ultrasonic waves. The method includes the steps that oxidation liquid is prepared from sodium bichromate and sulfuric acid, the oxidization liquid is slowly added into mixed mediums containing beta-methyl naphthalene, phase transfer catalysts and water to undergo reaction, and the ultrasonic waves act on the reaction system in the reacting process. Due to the fact that the ultrasonic waves have the promotion effect on the reaction, the temperature of the reaction system can be greatly lowered, side reactions are reduced, the product yield is improved, and the using amount of the oxidization liquid can be greatly reduced.