Taking the content of seven kinds of pollution such as permanganate index(CODMn), chemical oxygen demand (CODCr), Five days biological oxygen demand (BOD5), ammonia-nitrogen(NH3-N), petroleum, volatile phenol and total phosphorus (TP) in fourteen main rivers in Tianjin from 2004 to 2011 as the reference,this paper analyzed the characteristics of water pollution, difference and change trend in the major rivers of Tianjin. The result shows that the average contents of CODMn, CODCr, BOD5 and NH3-N appear a declining trend from 2004 to 2011; Petroleum changes little in different years;volatile phenol and TP prensents a typical W-shaped trend. The average content of seven pollutants in the same monitoring period have certain differences, but the differences are not significant.The paper supplemented the data of water quality analysis and statistics in major rivers of Tianjin for many years. The result can provide a basis for the prevention, protection and government of water environment pollution in Tianjing.