Abstract: In response to the energy supply characteristics and low carbon demand of polysilicon park,we introduced photovoltaic hydrogen production is introduced to optimize the traditional polysilicon park energy system. The multivariate Copula function is used to characterize the source-load correlation of "PV-electricity-hydrogen",and the two-layer optimization model of PV-fire-hydrogen polysilicon park is constructed by combining the coupling links and production processes of the system. The upper layer is a planning model aiming at the optimal cost of equipment operation in the park,and the lower layer is a low-carbon scheduling model aiming at the lowest overall operating cost of the system,and the optimal capacity of the equipment is determined through iteration. Taking a polysilicon park in Xinjiang as an arithmetic example,the validity of the configuration results is verified,providing theoretical support for the low-carbon transformation and economic operation of the polysilicon park.