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Timely identification of the overall cathodic protection status of the gas pipeline is very important for improving the safety of the gas pipeline and other public infrastructure. In this paper, an accurate and convenient method for evaluating the integral cathodic protection of the pipeline section, the protection current method, was proposed. This method could identify the overall cathodic protection status of the gas pipeline. In the soil environment of Beijing, various pipelines with different orders of magnitudes of electrical resistivity anticorrosive coating were selected for the feeding experiments. The protection current density required for the pipeline to reach the critical effective cathodic protection was clarified [the most positive polarization potential of the pipeline section was -0.85 V (vs CSE)]. Combined with field tests and numerical simulations, the influence law of anode pipe spacing on protection current demand value was analyzed and obtained.