目前国内地电观测台站外线路接线箱技术过于简单且型号不够统一，地电外线路直接影响观测数据的稳定与连续^[1]，我们通过借鉴相关技术，改造研制了新的地电外线路接线箱。它能有效根除接线箱内闸刀受潮后观测数据畸变的现象、改善断线器容易被雷击穿的情况等。使得在地电外线路接线中得到广泛应用。

Because the electric connection box of External Lines in terrestrial electricity in China is too simple and the sizes are not unified, which influence the stableness and continuity of the observed data of terrestrial electricity, we reconstructed the electric connection box of External Lines in terrestrial electricity , which can eliminate the distortion of data caused by the influence form moisture on the switch of electric connection box, and also decrease the destruction of the breaker struck by lighting, etc. so it can be used widely in electric connection box of External Lines in terrestrial electricity.