Abstract: Human inhabitation and settlement environment construction is increasingly valued.But due to lack of ecological sense, the human inhabitation and settlement environment are not improved.Landscape ecology stresses the interaction between landscape spatial pattern and its ecological function,and can guide the construction of human inhabitation and settlement environment.This paper describes problems that should be paid attention to in the construction of human inhabiation and settlement,and the construction in Xi'an was taken as a case study.

Key words: Veterinary additives, Olaquindox, Arsanilic acid, Oxytetracycline, Eisenia foetida, Acute toxicity test, Single cell gel electrophoresis test(SCGE)