Shield intervention is an inevitable process in shield tunnel construction. In reference with the practical experience on shield intervention in the tunnel between Zongbujidi Station and Feilong Road Station of Nanning Subway Line 4, this paper introduces the successful application of auxiliary intervention technology in shield tunneling at atmospheric pressure with the plain pile and dewatering in the Nanning subway. Based on the introduction of the engineering application background, the technical points for plain pile construction and dewatering in the auxiliary intervention method are described in detail, which can provide guidance for the selection of the intervention plan in shield tunneling in the Nanning area, and also provide reference for the selection of the intervention plan in shield tunneling under similar conditions.