The invention discloses an oil suspended agent for preventing fruit dropping as well as a preparation method and application thereof. The oil suspended agent for preventing the fruit dropping comprises the following components by weight percent: 1 to 40 percent of 1-methyl cyclopropene microcapsule granules, 1 to 10 percent of dispersing agent, 0.1 to 10 percent of thickening agent, 0.1 to 10 percent of stabilizing agent, and the balance of liquid carrier, wherein the content of 1-methyl cyclopropene in the oil suspended agent is 0.01 to 2 percent. The oil suspended agent has small particle size, and excellent emulsification performance, dispersity, spreading performance, viscosity, suspension rate and shelf life stability under the joint effect of the additives dispersing agent, thickening agent, stabilizer and the liquid vector; after being applied, the chemical effect can be continuously played in a given time, the chemical liquid is uniform in distribution in an open orchard environment, the acting time is ensured, the effect for preventing the dropping of fruits in a fruit picking period is good, and the harvesting time can be prolonged.