1100 土壤学报 47卷 the surface layer (0~5 c),but increased the total poosity and macropoosity at 10~15 and 20-25 an deph.Mukr fractal charac MT.The mu ltifractal spectra of the pores n the surface layer apparently leaned towad the rght side but approached to symm etry w ith increasng depth.Compared to MT.NT increased the Aa(a.-d)and AD (D.0-D)of soil pore epecialy at 10-15 an and 20-25 mm in depth 1994-2011 China Academie Joumnal Electronie Publishing House.All rights reserved.http://www.enki.net1100 土 壤 学 报 47卷 the surface layer ( 0~ 5 cm ), but increased the total porosity and macroporosity at 10~ 15 and 20~ 25 cm depth M ulti fractal characteristics were observed at 64~ 1 024 pixel scales and generalized dmi ensions (Dq ), multifractal spectra l (f ( ) ) and other related param eters reflected characteristics of the pore structure in the soil sections under NT and MTThe mu ltifractal spectra of the pores in the surface layer apparently leaned toward the right side but approached to symm etry w ith increasing depthCompared to MT, NT increased the ( - 10 - 10 ) and D (D- 10 - D10 ) of soil pore structure, and com plex ity of so il pore system, especially at 10~ 15 cm and 20~ 25 cm in depth K ey words So il tillage; M ultifracta;l So il pore structure; So il th in section