Abstract: Most of the Bengal delta is composed of alluvium of various geological age, thickness of alluvial layer is bigger, the sedimentary environment is complex, geotechnical variety, uneven distribution. In order to find out the site engineering geological conditions, using the drilling, standard penetration test, static cone penetration test, loading test, water injection test and Laboratory test and so on.the basic geological conditions of Dasherkandi sewage treatment plant are introduced in this paper, foundation soil suggestion value is given on the basis of statistical analysis of test results, and detailed analysis and evaluation of the project the main geotechnical problems.