This paper describes the first part of a study for obtaining useful data on the development of compression garments with high stretch knitted materials. Twenty types of compression garments sold in the domestic market were analyzed in terms of the knitting method and knit structure. After classifying these garment types into three elements of knit structure, a comparative analysis of the body part to which knit structure is applied was performed. Given the superior comfort of its finished product and seamless process productivity, the weft knitting technique was used more commonly than the warp knitting technique. All extracted knit structures were single-faced, and float and tuck were variously applied based on plain stitch. Plain stitch was applied on smooth body part surfaces, which do not require much compression. In the case of body parts that easily accumulate mass, such as the lower abdomen and sides, plain with float stitch was used by employing a mock rib structure to exert appropriate pressure on body and ensure a good fit. However, on body parts requiring a strong fit and pressure along with protection, plain with float stitch was used. Meanwhile, the structure in which float and tuck were combined based on plain stitch was applied for body parts with active muscles.