Abstract: Different geometrical characteristics are common in the modelling and analysis of microwave structure, the hybrid modeling method based on solid element and shell element is very effective, because the element and node number will decrease by the method. Aimed at the degree of freedom (DOF) matching problem, the implement and application of multipoint constraint (MPC) method is researched, the problem is analyzed with the feed structure analysis, and its accuracy is validated. The results show that the MPC method is very accurate, but building a model in the load area will lead to error.