The mechanical behavior of curved pipe jacking tunnels in soft soil strata is complex and variable, with significant stratum disturbance effects, and the control of the construction process is lack of a targeted theoretical basis. To address this engineering problem, the whole-process mechanical response of curved pipe jacking in soft soil sites is taken as the core research object, and the evolution laws of pipe joint internal force, stratum displacement, pipe-soil interaction and jacking force during the construction stage are systematically revealed. Based on a curved pipe jacking project of an electric power pipe gallery in Nansha District, Guangzhou City, a three-dimensional numerical simulation model considering the pipe-soil interaction mechanism is established. With 10m as a single construction step, the key mechanical response characteristics of the tunnel under jacking distances of 10m, 100m and 190m are simulated and analyzed. The results show that the Mises stress of the pipe joint is observed to show a continuous increasing trend during the whole jacking process, with the maximum stress of 12.91MPa detected at the outer bending side of the pipe joint near the starting shaft. The distribution of pipe-soil contact pressure and friction resistance is found to have obvious spatial differences, which is characterized by larger values at the vault and arch bottom and smaller values on both sides of the pipe body, and their maximum values are gradually raised to 0.33MPa with the increase of jacking distance. When the tunnel is jacked to 10m, the vertical displacement of the silty soil stratum is monitored to reach the peak, and the displacement extreme values are presented at the top and bottom of the tunnel respectively. The jacking force is proved to have a good linear fitting relationship with the jacking distance, and its variation trend is verified to be highly consistent with field measured data and theoretical predicted values, which validates the accuracy of the jacking force prediction formula. The research results can provide a theoretical basis for the design optimization, construction parameter regulation and safety control of curved pipe jacking tunnels in similar soft soil areas.