Abstract: The features of water environment variations were analyzed in an industrialized culture system of Litopenaeus vannamei.The results showed that NO₃^- was the major form of DIN,which had a proportion of 55%~85%.NH⁺₄ fluctuated in a low concentration range of 0.005~0.060 mg/L.NO^-₂ accumulated during the culture process in the 5# ponds,which had the same trend as NO₃^-.PO^3-₄ ranged from 0.012 mg/L to 0.400 mg/L with an overall upward trend.Contents of Chl-a in the ponds increased at the beginning and then decreased at the end of the culture,with a highest value in September.The number of total heterotrophic bacteria in cultural water was 2.80×10⁴~2.40×10⁵ CFU/mL,and 8.00×10²~1.00×10⁴ CFU/mL for Vibrio.Proportions of Vibrio in total heterotrophic bacteria were below 10% all the time.