This study aimed to develop UV protection fabrics by microencapsulation methods. The sol-gel method was used to manufacture spherical silica microcapsules in an O/W/O emulsion. UV protection fabrics were prepared by attaching microcapsules to cotton-knitted fabrics. The appropriate conditions for microencapsulation were 20 % (w/v) UV absorber content, 0.5 % (w/v) HPC addition concentration, 6 % (w/v) PEG addition concentration, 6 h agitation time, and 1000 rpm agitation speed. The particle distribution of microcapsules manufactured under the appropriate conditions was 2-12 ${mu}m$, and the average particle size was 6.27 ${mu}m$. With regard to the thermal characteristics of the microcapsules, the first peak appeared at $152^{circ}C$, with the second peak at $250^{circ}C$. Cotton-knitted fabrics treated with silica microcapsules maintained an 80-90 % UV protection rate even after repeated washing.