In modern electron positron colliders, both the electron and the positron runs in the tunnel, such as Circular Electron Positron Collider (CEPC) to be built and Beijing Electron Positron Collider (BEPCII). To guarantee good quality of the beam, beam diagnostics is indispensable. To achieve beam measurement of the electron and positron beams, picking up of these two different bunches in real time is an important task. Since the time interval between the adjacent electron and positron bunch is quite small, for example 6 ns in CEPC, high speed switch electronics is required. The paper presents the prototype design of a high-speed Radio Frequency (RF) electronics which is able to pick up nanosecond positron-electron beam bunches, with a switching time less than 6 ns. We also conducted initial tests in the laboratory to evaluate the performance of the electronics, and the results indicate that this module can successfully achieve bunch signal pick up within 6 ns time interval. The electronics makes it possible to measure electron and position beams respectively, thus improving the beam quality.