The invention provides mildew-proof and mothproof treating fluid for treating willow rattans, and relates to the technical field of production of wicker products. The treating fluid is prepared from the following components in parts by weight: 5 to 9 parts of table vinegar, 3 to 7 parts of alcohol, 3 to 7 parts of potassium alum, 1 to 5 parts of lysimachia foenum-graecum hance, 4 to 8 parts of babysbreath, 1 to 5 parts of fineleaf schizonepeta herb, 1 to 3 parts of Chinese parsnip root, 1 to 5 parts of sodium bicarbonate, 2 to 6 parts of sodium silicate, 3 to 7 parts of radix isatidis, 4 to 8 parts of honeysuckles, 1 to 5 parts of tabasheer, 1 to 3 parts of borax, 1 to 13 parts of cassia twig, 2 to 6 parts of sandalwood, 3 to 7 parts of as arum sieboldii, 6 to 12 parts of Chinese honeylocust fruits, 2 to 4 parts of wild peppers, 3 to 7 parts of kadsura root-bark, 5 to 11 parts of semen perillae acutae, 2 to 6 parts of aconitum carmichaelii, 5 to 11 parts of pepperweed seeds, 1 to 3 parts of radix euphorbiae lantu, 2 to 8 parts of radix stemonae, 5 to 9 parts of evodia rutaecarpa, 5 to 11 parts of pyrethrum and 2 to 4 parts of rehmannia glutinosa. According to the mildew-proof and mothproof treating fluid, the release of toxic substances is avoided in a using process, good mildew-proof and mothproof effects are achieved, the service life of a wicker product is greatly prolonged, mildew and moth can be prevented for more than 5 years, and the wicker product can also be kept fragrant, and has side effects on a human body; the mildew-proof and mothproof treating fluid also has a softening effect on willow rattans, and is favorable for weaving.