The invention relates to a seed soaking agent, in particular to a multifunctional high-efficiency seed soaking agent for sugarcanes. The multifunctional high-efficiency seed soaking agent for the sugarcanes comprises the following ingredients: 6-benzylaminopurine, indole potassium butyrate, thiophanate methyl, trichlorfon and high-efficiency chelating agent. The multifunctional high-efficiency seed soaking agent for sugarcanes, provided by the invention, is a safe and high-efficiency sugarcane seed soaking agent capable of preventing diseases, killing insects and increasing sprouting percentage and germination rate, which is developed according to the latest scientific research achievements of the agricultural chemical aspects as well as academic principles like phytopathology, agricultural entomology, phytophysiology and the like.