The invention relates to a high-elasticity antimicrobial waterproof and moisture-permeable type swimwear knitted fabric weaving and treating process, which solves the technical problems of the conventional fabric that the elasticity is low and is reduced rapidly if the fabric is used for a long time, the elastic recovery is poor, an antibacterial effect is poor, the density of the fabric is poor, the comfort is intermediate, the waterproof and moisture permeable performance is low and the like sequentially by the special design of raw material spinning, yarn weaving pre-treatment, machine weaving and after-finishing steps and the special optimization of related parameters. The process is optimized, the cost is reduced, the damage on the human body caused by the after-finishing of a chemical reagent is avoided, and the performances of high elasticity, antibiosis, watertightness, moisture permeability, high density and the like of the knitted fabric used for the swimwear are achieved; and a swimwear knitted fabric product with higher functions and comfort is obtained, and the mind and body safety of a swimmer is guaranteed.