选取选取山东省3个洞体应变台2007—2011年观测数据，分析资料的完整性、内在质量及干扰因素。结果表明：①观测资料连续性和完整性较好；②仪器零漂满足设计指标要求；③M2波振幅因子相对误差和相对噪声水平达到I类应变台标准；④仪器更新后观测质量提升；⑤洞体应变观测主要受仪器调修、气压、降雨和观测环境变化等因素影响。

This paper selected the observation data recorded by three stations of ShandongProvincefrom 2007 to 2011 and analyzed the integrity, intrinsic quality ,and their situations of interferences. The results show that：①the observation data of cave strain kept the continuous and integrity；②the year zero drift of each instrument met the design requirements；③the relative error of M2 wave amplitude factor and relative noise level were Class I strain monitoring；④observation quality was been improved significantly when the instruments had been updated；⑤the cave strain observation was mainly affected by the instrument repair, air pressure, rainfall and environment change.