In this paper, diffraction fields generated by 10°, 60°and 90°lossy wedges illuminated by TM (electric field parallel to edge) and TE (magnetic field parallel to edge) waves in TD-LTE 230MHz electric wireless private networks are simulated by using a heuristic diffraction coefficient. The influence of lossy wedge angle on diffraction field by changing diffraction angle, incidence angle and incidence distance is studied. The results show that when the incidence angle is larger, the influence of lossy wedge angle on diffraction field is larger. When the incidence angle is 45°, changes of diffraction fields generated by different lossy wedges with diffraction angle are almost the same, but when the incidence angle is 135°, changes of diffraction fields generated by different lossy wedges with diffraction angle make a big difference. Moreover, a conclusion that the lossy wedges have larger influence on the diffraction field with perpendicular polarization is drawn by simulations.