Power frequency electric field near the angle tower of double circuit transmission lines is seriously distorted, which becomes an important factor restricting the engineering design and environmental assessment of the transmission lines. This paper establishes a model for the simulation of power frequency electric field near the angle tower of 500 kV double circuit transmission lines. The validity of the model is verified by the comparison between simulation results and measured data. The distortion factors affecting the electric field on the rooftop are analyzed. Based on the electric field exposure limit, necessary control distance between the house and the transmission line is estimated. The results show that the closer the three-dimensional distance between the house and the line is, the more concentrated the electric field is and the more serious the distortion of the exposed field on the rooftop of the house is. The influence of house height on electric field decreases with distance increasing. Finally, the control distance between the houses and the lines under different house heights and turning angles is suggested, which could be referred in the planning and design of transmission lines.