通过对泰安地震台形变仪器观测资料质量的统计分析，发现影响观测质量的主要原因为：观测环境的改善、优化可以提高观测精度；仪器管理和数据处理水平可以影响数据精度；降雨、吸潮等对曲线趋势变化造成影响；环境恶化，如外界抽水等干扰，会使曲线日变固体潮失真，从而掩盖真实的地壳信息。

 This paper Stated and analyzed the deformation data quality from Taian Seismic station, discussed the main Factors Influencing data quality. Improving observation environment can improve the data quality; rainfall and moisture-absorption affect the Tendency of Observation curve. Environmental deterioration such as Pumping of Disturbance can distort the Curve of Earth tide solid tide and the truthful Crustal information will be eclipsed.