The invention provides a preservation method for stems of melons and fruits. The preservation method comprises the following steps: selecting the fresh melons and fruits without mechanical damages, plant diseases or insect pests, performing treatment on the stems of the melons and fruits by using a preservation solution, further airing, packaging, storing, transporting and the like, wherein the preservation solution contains 1-methylcyclopropene and thidiazuron, and 1-methylcyclopropene exists in the form of an inclusion compound of 1-methylcyclopropene. According to the method provided by the invention, a soaking or spraying way is adopted, the operation is simple, the method is suitable for sweet melons, watermelons, apples, pears, grapes and other varieties, the fresh color and luster and the plump state of the stems can be effectively kept, the quality of the melons and fruits is improved, and the storage period and the shelf life of the melons and fruits are prolonged.