Abstract: Microbiological induced corrosion (MIC) behavior of Cu-containing antibacterial pipeline steel and L245NCS pipeline steel were compared and studied by laboratory immersion test and field test in shale gas. The results demonstrate that in the presence of sulfate reducing bacteria, serious pitting occurred on L245NCS pipeline steel under both test conditions, and the corrosion rate in field test was 16 mm/a. Cu-containing antibacterial pipeline steel could effectively inhibit the growth of bacteria on the surface of the substrate, and thereby inhibit pitting. In addition, the biotoxic Cu element was enriched in the corrosion products, which furtherly improved antibacterial properties of the material. Cu-containing antibacterial steel is suitable for shale gasfield environment.