The earthquake trend of Kuma fault zone after the Henan M_S5.1 and the Maqin M_S5.0 earthquakes is analyzed and discussed on the basis of seismicity,anomalous changes of coda lasting time by Dawu seismic station and radon contents in groundwater by Changning, Huangyuan and Xining stations. The results show that there is an obvious corresponding relation between mid strong earthquakes in Henan-Maqin area and strong earthquakes along Kuma fault zone. There is a gap by M_L≥3.0 earthquakes at middle section of the Kuma fault zone. Anomaly of the coda lasting time still exists and the trend anomalies of radon content in groundwater still continue.Therefore, there is a background of strong earthquake along the Kuma fault zone after the two arthquakes.