The invention discloses a preparation method of atomized liquid for preoperative intervention and aims to solve the problem of broncholithiasis treatment. The preparation method comprises the following steps: extracting volatile oil for standby use from leaves of
Cunninghamia lanceolata (Lamb.) Hook., leaves of
cannabis sativa L., Rabdosia sculponeata (Vaniot) Hara and
Bulbophyllum inconspicuum Maxim. by
steam distillation, and reserving residues; mixing adult Gryllotalpa africana Palisot et Beaurois (or adult G. unispina Saussure), root of small-leaf oriental grape, root of
Rubus wilsonii Duthie, seeds of
Carex baccans Nees, larval Holotrichia diomphalia Bates (or larval Anomala carpulenta Motsch.), Buchnera cruciatas Hamilt., root of Salix wallichiana Anders., seeds of
Euryale ferox Salisb. and the residues obtained in step 1, and performing aqueous extraction to obtain an extract; concentrating the extract under reduced pressure, adding ethyl
alcohol into the
concentrated extract, keeping the
concentrated extract standing under
refrigeration, taking and filtering supernatant, recycling ethyl
alcohol from filtrate, adding 0.5w% of powdered
activated carbon into concentrated filtrate, boiling the concentrated filtrate for 30 minutes after uniform stirring, cooling the concentrated filtrate to 50DEG C, and performing suction
filtration with a 0.4mu m filter membrane; and adding 0.2w% of
potassium sorbate into suction filtrate, mixing the
potassium sorbate and the suction filtrate uniformly, and spraying the volatile oil obtained in step 1 into the mixture of the
potassium sorbate and the suction filtrate, uniformly mixing the volatile oil and the mixture, and performing subpackaging. Clinical experiments prove that the atomized liquid has the characteristics of good
curative effect and high safety in broncholithiasis treatment and is worth application and popularization.