The electromagnetic wave radiated by radome often occurs aiming angle deviation, beam distortion and other phenomena, due to the complex electromagnetic medium composition, special contour and complex working environment. For conventional optimization methods, harsh and complex situations increase its workload, especially the specific location parameter information is unknown. In this paper, a method with time-reversal technique for correcting the radiation beam distortion of the complex radome is proposed. With the time-reversal method, the concrete parameters of different positions for the radome and the surrounding environment information are not necessary to be determined in advance. The derivation shows that the environmental information is eliminated adaptively by the conjugate convolution operation, and it is proved by numerical operation that the signal of maximum radiation gain in target angle is time-reversal signal. Then based on the adaptive focusing properties of time-reversed electromagnetic waves, a top wedge radome and an icing working radome are studied as paradigms. The equal amplitude phase shifting method is set as the control group to highlight the advantages of time-reversal. In the end, the results show that the radiation beam aiming error can be reduced from ±10° to ±0.9° within ±45° scanning range for the top wedge radome in C-band. And the main beam annihilated has been converged again for the radome in the icing state. In addition, all the improvements are broadband, and the robustness of the entire radome system is enhanced by increased target angle energy caused by the directional of the array radiation being increased and the 3dB beamwidth being narrowed. This paper provides an effective method for the analysis of complex radomes and radio wave propagation in complex media.