The balance of original natural environment will certainly be broken during construction of water conservancy engineering. Simultaneously

the balanced system in construction region will be interfered. The const ruction results in the unstablility of regional geology structure

so stable issue of geo-envi ronment is caused.The relevant relation between environmental effect and water conservancy engineering

the relation between water conservancy engineering and unfavorable factors are analyzed

and suggests that deep and detailed investigation and research works for geo-technical environment engineering should be carried out

so as to overcome unfavorable factors and enlarge the environmental effects during the process of design

construction as well as the management of construction.