The invention relates to the technical field of fabrication of a lithium ion secondary battery, and provides a high-voltage and wide-temperature amplitude polymer lithium battery for a 3C digital camera and a fabrication method of the polymer lithium battery. The battery comprises a positive plate, a negative plate, a diaphragm, an electrolyte, a tab and a battery shell, wherein the positive plate comprises a positive active substance, a conductive agent, a binding agent and an aluminum foil, and the negative plate comprises artificial graphite, a conductive agent, a binding agent and a copper coil. A battery paste is synthesized by a high-viscosity stirring process, the paste is monitored by using a Turbiscan paste stability tester, the paste synthesis time is effectively shortened, paste dispersion is promoted, and the paste stability is improved. Meanwhile, with the combination of heating and formation, the energy density of the fabricated polymer battery is improved, the formation time of the polymer lithium ion battery is also greatly shortened, and the production efficiency of a factory is improved.