Abstract: The composition design of high carbon and low silicon microalloying was adopted, combined with optical microscope, scanning electron microscope, transmission electron microscope and universal tensile testing machine use to trial production of armored steel wire for logging cable used in deep-sea oil and gas exploration were carried out. The results show that the microstructure of armored steel wire rod is full lamellar pearlite structure, and there are no abnormal structures such as proeutectoid ferrite, proeutectoid cementite and martensite. The cooling process after rolling is reasonable, and the strength is 1 623 MPa. After the wire rod is cold drawn to steel wire, the lamellar cementite in pearlite appears torsion and fracture, and the morphology of granular cementite appears. The tensile strength of steel wire is increased to 2 084 MPa by cold drawing hardening.