Some special aseismic precursory anomalies obtained from Shaanxi precursory network are presented. Analysing the cause of these anomalies, following views are got:the two anomalies of groundwater level of Shuangwang well, Weinan in 1986 and 1996 may be caused by the flood peaks of the Weihe River;the big anomaly of ground tilt observed from Hancheng station in 1977 had relation to the level of the Yellow River;the anomaly of ground tilt observed from Ankang station in 1983 was due to the big flood in Ankang area in that time;the two big anomalies of groundwater level of Sanyuan well had relation to water storage of Fengcun reservoir.