The invention discloses an insect-proof and mildew-proof method for traditional Chinese medicine dangshen, which is used for solving the problems of mildewing and insect damage in the storage process of the traditional Chinese medicine dangshen after picking. The method comprises the following steps: soaking the picked traditional Chinese medicine dangshen in a 5-8 millimole/liter aminolevulinic acid solution, and vacuumizing the solution to 0.08-0.07MPa; maintaining the vacuum condition for 1-3 minutes; taking out the medicine, and draining off the medicine; irradiating the medicine with sunlight; and then drying the medicine in the shade. The method disclosed by the invention is simple, is convenient and easy to operate, and is relatively low in cost; and meanwhile, the aminolevulinic acid is a common natural ingredient in fruits and vegetables, is nontoxic, harmless and environment-friendly and has no side effect on the medicine dangshen in the characteristic parameters, thereby overcoming the obvious defects of the currently common technology which emphasizes the control of mildewing and insect damage from the downstream part.