Abstract: By the modern method of grey relative analysis in combination with the traditional methods of variance analysis and multiple examination,the paper dealt with the disturbance effect of four arbor mangrove populations,which were introduced artificially into a secondary shrub community eight years ago. Two shrub populations(Agiceras coruiculatum and Ceriops tagal)and the whole comrnunity as well as the disturbance intensity, properties and mechnism were studied. Which revealed the ecological characteristics of above shrub populations after being disturaed.Therefore,guidance is provided for improving the same types of other shrub communities by using the arbor populations to control the shrubs by means of biological measures.