Abstract. In the coastal areas, the logistics industry and sales industry have taken a great development, and development is very rapid, it is necessary to research the relationship between logistics status and product sales model of coastal areas, and it has an important value in practice. The logistics supply and product sales of coastal area has a certain promotion relationship, quantitative analysis of the relationship between logistics and product sales in the coastal area is studied. Because it can alleviate the load pressure of logistics resources, improve the important role of logistics resource distribution and logistics supply efficiency. The traditional model uses game model for mathematical modelling analysis of logistics status and product sales in coastal area, unbalanced problems of resource allocation between logistics and product sales in the coastal area has occurred. According to this problem, an improved promotion relationship mathematical model of the coastal area of product sales and logistics is proposed based on logistics and logistics distribution computing, logistics resources distribution and product sales promotion model principle is analyzed, uses the data mining technology as a tool, extract the necessary information and knowledge, logistics and product sales promotion and relationship model of coastal areas is constructed, to solve the nonlinear programming model and it can provide the logistics decision function for sales industry, influence factor of logistics to promote product sales in the coastal area is calculated, the game and contain of logistics and product sales in the coastal area are analyzed, the mathematical model is constructed to achieve the best proportion, the logistics service level and return index are taken for comparison, the simulation results show that, can effectively improve the logistics service level, improve logistics gain with this model, improve the throughput gains of logistics and product sales, and it can promote the rapid growth of the logistics industry and the retail industry revenue.