The invention discloses a phenylamine/N-methyl thionine copolymer and zinc-phenylamine/N-methyl thionine copolymer secondary battery. In an electrolytic cell formed by three electrodes, under constant temperature and constant pressure, an electrolyte prepared from phenylamine, N-methyl thionine and sulfuric acid is electrolyzed by means of cyclic voltammetry; an electrolytic product is obtained on a working electrode and is washed by using secondary distilled water and dried at the temperature of 60-90 DEG C to obtain the phenylamine/N-the methyl thionine copolymer. The secondary battery is prepared by using the copolymer as a cathode, using a zinc plate as an anode, having ZnCl2 and NH4Cl electrolytes, and using Pooh Aaron cloth as a membrane. The secondary battery is high in charging/discharging performance; when the current density is 2mA.cm<-2>, the coulombic efficiency of the secondary battery is 96.62 percent at a maximum; after the secondary battery is charged and discharged for 150 times, the coulombic efficiency is 99.16 percent, and the specific capacity is reduced by 3.43 percent, so that the battery has good application prospect.