Xanthine oxidase inhibitor

The invention belongs to the technical field of medicine and relates to 2-(3-cyano/nitro-4-substituted phenyl)-4-methyl-2(i)H(/i)-1,2,3-triazole-4-methane acid and formyl hydrazine compounds shown in the formula I, medicinal salt and medicinal solvate and a preparation method thereof. The substituent definition of the compounds is defined as claim books and manuals. The invention further relates to application of the compounds in preparation of medicine for treatment of hyperuricemia and gout diseases.