In recent years, with the rapid development of urban gas industry, buried gas pipeline network as the lifeline of the city has been distributed in various communities in the city. Due to the increasingly complex underground environment of urban gas pipelines, corrosion and leakage incidents of gas pipelines occur frequently. However, there is still a lack of clear understanding of the key influencing factors of gas pipeline corrosion and its corrosion law. Based on field and laboratory test data, this paper clarifies the key influencing factors of low-pressure steel gas pipeline corrosion through correlation analysis. When the current density can be obtained, the key influencing factor of low-pressure steel gas pipeline corrosion is considered to be the current density. When the current density cannot be obtained, IR drop, soil resistivity and on potential are considered to be the key influencing factors of low-pressure steel gas pipeline corrosion. The variation law of the key influencing factors and corrosion rate of low-pressure steel gas pipeline corrosion is further studied. The results show that under steady-state DC interference condition, with the increase of current density, the corrosion rate tends to increase. The coupons from the surface of the localized corrosion gradually changed to uniform corrosion, and the degree of corrosion gradually increased. With the increase of the IR drop, the corrosion rate tends to increase. With the increase of soil resistivity, the corrosion rate tends to decrease. With the positive shift of on potential, the corrosion rate tends to increase.