This paper takes D component of the recording instrument as an example.We have solved the problems of unsteadiness of the base-line value for FGE fluxgate magnetometer in Chongming Station.

• 本文以记录仪的D分量为例，通过认真仔细地分析与探索，使用数据处理的方法．解决了崇明台FGE磁通门磁力仪基线值不稳定的问题。