Abstract: This paper deals with anatomical structures of the vegetative organs of Portula oleracea growing in saline-alkali soil of Chifeng, contrasted to the same species living in black soil, using light microscopical technique.The results showed that it adapted to saltmorphic circumstances through the following characters: A lot of aerenchyma existed in the vegetative organs;Phellem highly expanded in roots;thick cuticula;more mucilage cells and aleurone grains in parenchyma of roots and stems;A lot of water storing tissue.rich crystal cells and chloroplasts existed in mesopyll tisses.such characters were not existed in Portulaca oleracea which lives in black soil.

Key words: salinized soil Portulacea oleracea, saline morphic structure, ecological adapt