Using NOAA Global Ocean Data Assimilation System(GODAS) monthly sea surface height(SSH) data,NCEP/NCAR monthly 850 hPa wind field reanalysis data,and monthly precipitation of 160 stations in China,the temporal and spatial characteristics of SSH interdecadal anomaly in the tropical Pacific and the relationships among SSH,850 hPa wind field and summer precipitation in eastern China are investigated.The results show that: 1)From autumn to winter,the main spatial pattern of SSH interdecadal anomaly in the tropical Pacific develops toward the similar “ENSO” pattern.From spring to summer,the similar “ENSO” pattern gradually decreases,and eventually disappears.An obvious SSH interdecadal turning in the tropical Pacific occurs around 1996.The SSH shows the low-east and high-west pattern since 1996,with some different evolutions in different seasons.2)A weak SSH fluctuation in summer over the tropical Pacific takes place around 1990,which continuously affects summer atmospheric circulation,weakens East Asian summer monsoon around 1992 and causes summer precipitation significantly abundant(deficient) in regions south of the Yellow River in eastern China,especially in South China(in Sichuan Basin and Northeast China).The substantive turning of SSH around 1996 exacerbates the above interdecadal variation trends of summer precipitation in China.