Abstract: Coastal industrial parks have a large amount of steam demand, and there are problems of low energy utilization and serious wind power waste. To this end, taking a coastal industrial park close to the grid integration point of offshore wind power in Jiangsu Province, China as the research object, an optimal dispatch method for the integrated energy system considering the energy grade conversion of high-temperature steam heat pumps is proposed. First, an energy grade conversion model for high-temperature steam heat pumps is built to achieve the electrothermal coupling and energy cascade utilization. Then, a wind power accommodation strategy with high-temperature steam heat pumps is proposed to promote the wind power accommodation in the system. Finally, considering prediction errors for the wind power output, a stochastic optimal dispatch model of the integrated energy system is established with the minimum total operating cost as the objective function. The simulation results show that the proposed dispatch method effectively promotes the accommodation of offshore wind power, and can meet the steam load demand of the industrial park while decoupling the “heat-based power” operation constraints of combined cooling, heating and power（CCHP）units. Meanwhile, the proposed method improves the energy utilization efficiency, has good social and economic benefits,and can effectively guarantee the reliability of system operation.