The invention discloses a bamboo cooking additive and a preparation process thereof. The bamboo cooking additive comprises the following raw materials in part by weight: 20-35 parts of sodium dodecyl benzene sulfonate, 15-30 parts of fatty alcohol-polyoxyethylene ether, 15-30 parts of alkylphenol ethoxylates, 4-16 parts of sodium pyrophosphate, 5-18 parts of sodium alkyl sulfate, 1-5 parts of anthraquinone and 50-150 parts of deionized water. As an anionic surfactant and a non-ionic surfactant are introduced, the permeation can be accelerated, peeling reaction can be suppressed, removal of lignins and resins is promoted, the reaction performance in the bamboo cooking process is improved, the cooking uniformity of the bamboo is improved, the quantity of cooking alkali can be reduced, the cooking time is reduced, the highest cooking temperature is reduced, the pulp forming quality is improved and the yield is increased.