NOVELTY - High capacity lithium-ion electrolyte comprises a lithium salt, a non-aqueous organic solvent, film forming additive, flame-retardant additive, anti-overflow additive, stabilizing agent and wetting agent, where the wetting agent is nonionic surface active agent and comprises fluoroalkyl sulfonic acid, lithium fluoroalkyl sulfonate, fluoroalkyl phosphate, fluoro nonyloxyphenyl sodium sulfonate, fluoro nonyloxyphenyl lithium sulfonate or fluoro polyoxyethylene ether. The fluoro can be full fluoro or partial fluoro. The alkyl has 4-10C.    USE - The electrolyte is useful for preparing lithium-ion batteries.    ADVANTAGE - The anode has high nickel content, which ensures the working stably and reduces the cost of battery. The adding of multi-functional additive makes the lithium ion electrolyte with high power capacity capable of displaying the high specific capacity. The electrolyte has excellent safety performance, high temperature performance and circular life.    DETAILED DESCRIPTION - High capacity lithium-ion electrolyte comprises a lithium salt, a non-aqueous organic solvent, film forming additive (0.5-7 wt.%), flame-retardant additive (0-15 wt.%), anti-overflow additive (2-10 wt.%), stabilizing agent (0.01-2 wt.%) and wetting agent (0.01-1 wt.%), where the wetting agent is at least one of nonionic surface active agent, comprising at least one of fluoroalkyl sulfoacid, lithium fluoroalkyl sulfonate, fluoroalkyl phosphate, fluoro nonyloxyphenyl sodium sulfonate, fluoro nonyloxyphenyl lithium sulfonate or fluoro polyoxyethylene ether. The fluoro can be full fluoro or partial fluoro. The alkyl has 4-10C. An INDEPENDENT CLAIM is also included for the preparation of a lithium-ion battery, comprising: (a) mixing and blending the conducting agent and the bonding agent for 0.5-1.5 hours, adding the anode active matter in the mixture until there is no dry powder, blending for 1-3 hours at high speed, preparing the pulp with the viscosity coefficient of 4000-6000 cps by using solvent, coating the pulp on the aluminum foil affluence body with the thickness of 10-20 mu , drying and rolling to form the positive electrode, shearing and making it to small slices of anode, soldering the small slices of anode and the anode lug together via laser; (b) mixing and blending the conducting agent and the bonding agent for 0.5-1.5 hours, adding the anode active matter in the mixture until there is no dry powder, blending for 15-60 minutes at high speed, coating the pulp on the copper foil affluence body with the thickness of 5-15 mu , drying and rolling to form the negative electrode, shearing and making it to small slices of cathode, soldering the small slices of anode and the cathode lug together via the spot-welding machine; (c) using the film compounding polypropylene and polyethylene as the membrane, coiling to form a battery cell, placing it in an outer shell of the battery, injecting it into the electrolyte and sealing and performing a forming process.