With further research on the micro channel-plate(MCP) photoelectric multiple structure of anodized transmission of composite waveguide applied in Free-Space Optical communication, the disadvantage of the models have been found. Firstly, some analyzes about the constraint conditions and performance of the MCP photoelectric multiple structure of composite waveguide have been conducted. Secondly, one device model based on one grid-controlled structure of composite waveguide has been introduced and verifiable experiments have been conducted as a support. Then, the capability of electron transport of two structures is compared by theoretical analyzes. Lastly, the difference between performances of these two structures has been confirmed by verifiable experiments with optical axis positioning by four-quadrant in a vacuum. Results of the experiment have showed that the grid-controlled structure of composite waveguide would be likely to be widely applied in the special detection for its advantages in the future.