The precipitation anomalies during June-July 2010 in east China were divided into three stages according to the distribution of rain bands during Meiyu period,based on the daily precipitation dataset archived in meteorological stations in China.Rain bands concentrated in the middle and lower reaches of the Yangtze River(MLYR) during the first stage(June 7—11),then the rain center moved southward to regions south of the Yangtze River during the second stage(June 18—22),while there still had precipitation peaks in the MLYR.Finally,rain band center moved back to the MLYR during the third stage(July 7—17).The relationship between the circulation features and the west Pacific subtropical high anomalies during the three stages were analyzed using NCEP/NCAR reanalysis data.Results showed that the north-south migration of rain belt was closely related with strong cold air invasion from north during the second stage.The warm shear line and weak warm shear line appeared in the MLYR during the first stage and the third stage,respectively,which was the main cause of these two precipitation processes.Moreover,the water vapor flux convergence and plentiful vapor resources in the MLYR also favored the three heavy rains.A significant negative correlation is found between the west ridge point index of the western Pacific subtropical high and the precipitation processes in MLYR during June-July 2010.Thethree heavy precipitation processes are in correspondence with the westward of west Pacific subtropical high,while the precipitation just occurred in areas north of the western Pacific subtropical high.So we concluded that the western Pacific subtropical high anomaly is one of the main reasons of heavy rainfall from June to July in the MLYR.