Abstract: A system dynamic model was used to analyze the impact of development in rural industry on agroecosystems in Wujiang city, a rural industrialized region of southern Jiangsu Province. The results show that there are both positive and negative impacts of rural industrialization on agroecosystem. The positive impacts display an increase of farmer's income and agricultural input, and a transference of promoting rural labors, while the negative impacts show a decrease of cultivated land and a result of environmental pollution. The negative impacts could be weakened or avoided, and the rural industry could be coordinately developed with agriculture, if a proper proportion of profit gained from rural industry would be used for agricultural development and environmental control after the actual strength of the rural industry was increased.

Key words: Rural industry, Agroecosystem, System dynamic model