[Objective] To explore the soil quality evaluation method of soil stripping in tillage layer in building Qingdao New Airport

and to determine the soil stripping depth of the tillage layer according to the soil quality grade

so as to provide the basis for the soil stripping utilization scheme of the tillage layer.[Methods] According to index design principles

we analyzed the concept and the demand of the tillage layer stripping and drew a conclusion of soil quality evaluation system. The fuzzy membership model was used to estimate the soil fertility. The Nemerow multi-factor index was used to estimate the soil contaminating degree of the heavy metal and organism. The comprehensive quality of soil was evaluated by soil quality index to rank soil qaulity

then the stripping depth of tillage layer is achieved.[Results] Soil quality grade of tillage layer was achieved

that sample points of 1

3

4

5

8

11

12 were the first

sample points 2

6

9 are the second

sample points 7

10 were the third.[Conclusion] The first grade soil quality is the best

and the average thickness of tillage layer is 20 cm. The recommended soil stripping depth is 30 cm.The second grade soil quality is the better

and the average thickness of tillage layer is 20 cm. The recommended soil stripping depth of the occupied and damaged tillage layer is 20 cm for the new airport construction project.The third grade soil quality is medium

the average thickness of tillage layer is 20 cm. It is suggested to select part of damaged and occupied tillage layer with high quality to strip for the new airport construction project. The recommended soil stripping depth is 10 cm.