The invention discloses an electric field calculation APP for a big motor stator line rod end part model. A method comprises the steps of 1, performing parameterization modeling on the end part of a big motor end part (the parameterization control on the end part wire core cross section dimension, the three-dimensional twisting angle of an end model, the thickness of an insulation layer and an anti-halation layer, and the length of each section of the three-section type anti-halation layer is realized); 2, performing finite element numerical simulation analysis on the model built through parameterization; adding corresponding materials on the model; performing mesh generation; using a frequency domain solver at 50hz for electric field calculation; solving the corresponding electric potential and electric field and the consumed distribution diagram; 3, building an end electric field finite element calculation APP according to the process; performing end part anti-halation layer electric field and electric potential and loss solving through changing the dimension parameter, the material parameter and the test parameter of a model. The electric field calculation APP has the advantages that the time consumed by development personnel in the modeling and simulation process can be effectively saved; the design efficiency is effectively improved.