A multifunctional high-efficiency plant regulator provided by the invention comprises the following components of: by weight, 1-3% of ginger, 3-5% of Tripterygium wilfordii, 3-7% of garlic, 0.5-1% of dried chilli, 0.1-0.3% of pepper, 0.1-0.3% of Chinese prickly ash, 2-5% of brown granulated sugar, 0.5-1% of acetic acid (with the concentration of 30%), 1-2% of ethanol (with the concentration of 95-98%), 0.1-0.3% of honey, 0.005-0.02% of yeast, 2-3% of bio fungus and 72-86.7% of magnetized water. The multifunctional high-efficiency plant regulator is prepared by the following processes of: sterilizing, mashing up, immersing, mixing, stirring, fermenting, examining, filtering, subpackaging and warehousing and the like. The multifunctional high-efficiency plant regulator has effects of adjusting plant growth, killing pathogen, repelling insects and converting beneficial elements of soil, is convenient to apply, is nuisance free, and has no toxic or side effect. By the utilization of the multifunctional high-efficiency plant regulator, its multifunctional effects of plant growth adjustment, diseases repelling and promotion of soil ecological environment balance are realized. The multifunctional high-efficiency plant regulator is an important technological means for the production of nuisance-free agricultural products, organic agricultural products and green agricultural products, and is applicable to being produced by plant growth regulator manufacturers.