Colpitts chaotic oscillation circuit is composed of a triode and other linear components. It has a very extensive range of research and application. Colpitts chaotic oscillation circuit can generate a variety of chaotic signals, which can be applied to wireless transmission, communication encryption, signal detection and other fields. In this paper, two types of Colpitts chaotic oscillator circuits are introduced, and their circuit models are analyzed. At the same time, the chaotic signal generated by them is compared and analyzed, and the chaotic signals are used as the excitation signal of the wireless transmission system. In addition, the complementary cumulative distribution function curves show that the optimal Colpitts chaotic oscillation circuit has a preferable conversion efficiency of the rectifier circuit in the wireless power transmission system. Finally, the detailed chart of conversion efficiency of these circuits has been demonstrated.