对常熟市1976年以来历史有螺环境进行调查。全市16个镇查出有螺环境425个,有螺面积124 893 m2,历史有螺环境和有螺面积改造率达76.71%和86.92%。其中沟渠、池塘、田地的改造率分别为98.17%、97.93%、95.04%,河道的环境改造率为28.23%。提示需积极开展对历史有螺河道的环境改造。 Changshu City since 1976, the history of a snail environment investigation. In the 16 towns of the municipality, there are 425 snail environments with a snail area of ​​124 893 m2. The historic spiral environment and snail area improvement rate reached 76.71% and 86.92%. Among them, the renovation rates of ditches, ponds and fields were 98.17%, 97.93% and 95.04% respectively, and that of river courses was 28.23%. Prompted to actively carry out the history of the spiral river environment transformation.