Abstract: Water-soluble packaging can reduce the risk of usercontact with and inhalation of pesticide powders and is currently an important solution for reducing dust hazards. However, the water-soluble packaging materials themselves may have an impact on the suspension rate of different wettable powders (WP). In order to explore the mechanism by which water-soluble packaging materials affect the suspension rate of wettable powders and find appropriate improvement strategies, based on the finding that water-soluble packaging materials have an impact on the suspension rate of different types of wettable powders, this study took bendiocarb 80% WP as the representative agent and systematically investigated the effects of factors such as temperature, water quality, and added auxiliaries on the suspension rate of the preparation when water-soluble packaging bags were added in accordance with relevant national standards. The results showed that when the dilution water temperature was 17 ℃, the influence trends of different types of packaging bags on the suspension rate of bendiocarb 80% WP were basically the same, all reducing it to below 70%. When the dilution water temperature was 28 ℃, the suspension rate was higher than 70% and met the requirements; when diluted with standard hard water at a low temperature of 17 ℃, the suspension rate of the diluted solution of water-soluble packaged WP was significantly reduced and could only be maintained at 40%; under these conditions, the effects of adding inorganic salts of different valences, suspending agents, and dispersants on the suspension rate were further investigated. The results showed that when the addition level of the divalent inorganic salt magnesium chloride was 0.048 mol/L in 250 mL of the preparation, the suspension rate was the highest, reaching 90.97%. Utilize dosages equivalent to 1%, 2% and 10% of the mass of bendiocarb 80% WP as the amounts of the suspending agents, when the addition level of the suspending agent magnesium aluminum silicate XM410 was 62 mg/g, the suspension rate was the highest, reaching 93.06%; although the addition of different amounts of the dispersant calcium lignosulfonate could also improve the suspension rate of the preparation to some extent, the suspension rate was still below the qualified standard when its dosage level was as high as 313 mg/g. In conclusion, a higher dilution water temperature and the appropriate addition of magnesium chloride or magnesium aluminum silicate to the preparation can improve the suspension rate of water-soluble packaged bendiocarb WP and ensure that it meets the qualified standards, which provides a theoretical basis for the scientific and rational use of water-soluble packaging materials.