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This paper focuses on one 10kV power distribution line in the south area of Zhejiang. Most of this 10kV power distribution line is located in the mountains, where have soil resistivity. The ground resistance of the towers mostly failed to meet the design requirements, and the overhead power distribution line are in high back flash rate and line disconnection rate. By adopting the computer simulation and aided design techniques such as ATP-EMTP and CDEGS software, the influences of installing line lightning arresters, erecting coupling ground wire, reducing the tower grounding resistance and adopting unbalanced insulation device on the lightning protection level are analyzed from the perspective of simulation studies. The simulation results have shown that combination of the first three kinds of lightning protection strategies could greatly improve the protection level of 10kV power distribution line against both direct and induced lightning. After this line is reconstructed by the lightning protection strategies based on the above mentioned simulation results, the faults caused by lightning have never occurred so far, which demonstrates the lightning protection effect is remarkable.