Previously, we performed de novo RNA sequencing of Scolopendra subpinipes mutilans using high-throughput sequencing technology and identified several AMP candidates. Among them, a synthetic peptide (CP112) was designed based on the physicochemical properties of antimicrobial peptide such as length, charge, isoelectric point. Here, we have assessed the antimicrobial activities of CP112 against various microbes and the antioxidative effects. The results showed that CP112 had antimicrobial activities in radial diffusion assay and colony count assay. In addition, we found that CP112 bound to the surface of microorganisms via a specific interaction with lipoteichoic acid, lipopolysaccharide and peptidoglycan, which is one of bacteria cell wall components. Furthermore, CP112 has shown significant DPPH radical scavenging activity. Taken together, the results would be provided the basis for developing of peptide antibiotics and antioxidants.