Based on the pile-soil interaction principle and mechanical equilibrium theory, we analyzed the pile-driven resistance and proposed two relevant measures to improve pile-body structure in order to improve portability and reduce energy consumption of anti-flood spiral pile. The first measure is to properly reduce outside diameter of hollow cylinder with invariable bottom outside diameter of cone, and the second measure is to properly reduce length of spiral blades. Thus, we obtained the contrast pile-driven torque curves by driving original pile and modified pile. The curves show that the maximum pile-driven torque is greatly reduced by 39.3％ and 16.5％, respectively, due to the two measures. It also shows that the piledriven torque of anti-flood spiral pile has an extreme value, and the modified pile increased the safety coefficient of pile section intensity when pile-driven. Moreover, the modified pile still meets the actual requirements although its lateral displacement would be larger than the original pile for lateral load.