NOVELTY - A flexible polymer solar battery with metal grid anode layer has flexible substrate, anode layer, cavity transmission layer, active layer, electron transmitting layer and aluminum (Al) electrode cathode. The anode layer is made of silver (Ag), copper (Cu), nickel (Ni) composition metal wire grid material.    USE - A flexible polymer solar battery with metal grid anode layer.    ADVANTAGE - The flexible polymer solar battery with metal grid anode layer has better performance, film forming ability of PEDOT:PSS on the surface of the anode is improved, the balance between the cavity transmission layer and the electron transmitting layer is reinforced and energy transforming efficiency is greatly raised.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing metal grid anode layer for flexible polymer solar battery involves preparing the grid template by exposing and developing ultrafine particles dry plate and printed circuit board (PCB) film via laser to prepare grid template with grid pattern and adjusting the line width, line interval and density level of the grid to obtain different grid patterns, preparing the metal grid on the flexible poly(ethylene terephthalate) (PET) substrate by printing the grid template with grid pattern on silver halide light-sensitive film or using laser to scan the grid pattern on silver halide light-sensitive film, developing, fixing and solidifying to obtain metal silver grid pattern on the flexible substrate, depositing lithium fluoride (LiF) layer on anode layer by using vacuum evaporation method to deposit 1-10nm thick LiF layer on metal grid with vacuum degree of 2x 10-4 Pa and evaporation rate of 0.01 nm/s, spin coating cavity transmission layer by using spin coating method to coat poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) on LiF layer, performing oxonium ion treatment for 5 minutes and heating for 2 minutes at 80 degrees C, spin coating active polymer film by using polymer poly(3-hexylthiophene) (P3HT) as electron donor, using phenyl-C61-butyric acid methyl ester (PCBM) as electron acceptor, mixing to 1:1 weight ratio, using spin coating method for forming the film with rotating speed of 2000 r/minute and thickness of 90-150 nm, depositing LiF layer on active polymer film by vacuum evaporation method to 1.8 nm thickness at vacuum degree of 5x 10-4 Pa, performing vacuum evaporation processing of Al electrode as cathode by using vacuum evaporation processing mask on a 100 nm thick Al electrode layer with evaporation rate of 0.03-0.06 nm/s, shifting the device to dry box after processing the Al electrode and heating for 2 minutes at 80 degrees C, cooling to room temperature and packing to obtain flexible substrate polymer film solar battery.    DESCRIPTION OF DRAWING(S) - The drawing shows a structural diagram of flexible polymer solar battery with metal grid anode layer. (Drawing includes non-English language text).