Long-term shielding will affect photovoltaic panel photoelectric conversion and produce hot spots, and the output U-I curve of the corresponding photovoltaic array will also change, and the corresponding U-P curve will contain multiple peaks. In order to accurately locate hot spots, it is necessary to analyze the mechanism of hot spots generation and build a universal pv array model with shadow occlusion. In view of the traditional engineering model cannot accurately describe the electrical parameters of complex PV array such as CTCT, this paper proposes a multi-point flat throw motion pv array mathematical model with shadow occlusion. In order to verify the accuracy of the model, Matlab/Simulink modeling and simulation was used to build a hot spot simulation platform, and the light intensity was changed to simulate shadow occlusion and the connection mode of photovoltaic panels. The U-I and U-P characteristic curves of photovoltaic array were obtained and analyzed, compared with the engineering model, the proposed model reduces the operation time to 2.5%, and can describe the output characteristics of the complex photovoltaic array under local shadow more comprehensively.