Reverse-resisting yield-increasing preparation for plant

The invention relates to a plant resistance agent, in particular to a leaf surface preparation for rice disease-resistant and yield increase, which belongs to the field of plant nutrition physiology. The preparation consists of a proline, a methionine, phenylalanine and other basic components as well as a trace element, an additive and water. The preparation is directly added through the leaf surface, with the resistance effect on disease, such as rice blast, etc.; the key point is that the methionine is transmitted into ethylene, which activates an oxidase and lyase system in vivo, promotes the phenylalanine and the proline to synthesize a lignin and strengthens host cell wall; cell allergic necrosis reaction is formed; a plant protection is generated, such as a flavonoid and a phenolic acid, etc. The invention can be sprayed in breach period and full heading period of the rice, and with test, control effect of rice blast is more than 75 percent, which is similar to that of a tricyclazole, moreover, disease