In this paper, we propose and verify a calculation and analysis model of shading and blocking in a linear Fresnel reflector system. Specifically, 16 mirrors are arranged at an equal spacing and the aiming line height is 9056 mm. For this setup, we compare the shading calculation results from the proposed model with those from SolTrace at a mirror spacing of 100 mm. Then, we present one example of how to determine the best mirror field spacing for the proposed model under the above conditions, and it is found that the ideal spacing is 331.91 mm, close to the 330 mm obtained via the traditional shadow-less layout method. Finally, we verify the accuracy of the proposed calculation model. The proposed model can be used to analyze shading and blocking in the field of a linear Fresnel reflector, and it is helpful to guide the design of a linear Fresnel reflector system.