Abstract: In the viewpoint of ecology and based on the principle of land optimal allocation, optimal allocation scheme of land resources is constructed and put to build the land suitable for forest and grazing by matching the current situation of land use with the directions of land suitability. Then according to the status quo of land resources, planting site types are put forward. The soil type, relief, salty and underwater level are combined as main factors and irrigation condition as a reference to sort site land into 8 types. In this way, the land suitable for forest and grass is greened according to planting patterns. Finally suitable trees are suggested and utilized to build up the ecological green oasis in the Yellow River Delta.

Key words: Yellow River Delta, land resources, site condition types, optimal allocation