Abstract: Discusses the production/sales decision model for the price control of the seasonal goods on tight market, such as perishable vegetables and fruits. Based on people's daily economic activities and their natural demand for such goods with relevant sales volume on market in a yearly period, some conditions are assumed as actual as possible to develop a model. By way of mathematic analysis and extremum method, and the curves expressing the functions of sales price curve and the sales volume are determined reasonably. A theoretical reference is thus provided for goods supply pricing, which will serve a directive function to agriculture production and relevant business operation.