对甘、宁、青三省区70个台站，121个测项自正式观测以来的全部资料进行了整个时间域的处理分析，结果表明单测项短临异常对应地震的条件概率（信度）大多数是比较低的，只有采用适当的综合预报方法才能有效地提高预报水平。通过深入研究提出了三种综合分析预报方法，即“前兆信息量直接计算法”，“多因子综合相关分析法”及“信息合成法”，其中以“前兆信息量直接计算法”普适性、可操作性更好一些。 The data of 70 stations in Gansu, Ningxia and Qinghai provinces and 121 stations since the formal observation have been processed and analyzed in the whole time domain. The results show that the conditional probabilities (reliability) Most of them are relatively low, and the forecasting level can be effectively improved only by adopting appropriate comprehensive forecasting methods. Through comprehensive research, three comprehensive forecasting methods are proposed, namely “direct calculation method of precursor information quantity”, “multi-factor comprehensive correlation analysis method” and “information synthesis method”. The universal method of direct calculation of precursor information Operability is better.