In order to solve the problems of water surface garbage collection and water pollution prevention in small and medium-sized landscape lakes, a design scheme of a new type of two-body small decontamination boat was proposed. It is equipped with a visual positioning system for surface garbage based on convolutional neural network (convolutional neural networks, CNN), which is used to identify and locate the floating garbage on the water surface. It adopts a two-body and scissor door design, and uses a composite vacuum curing process to improve the structural strength of the hull. The modeling and simulation analysis of the strength and stiffness of the decontamination ship are carried out, and the results show that the ship has high structural strength, good navigation condition, and can operate stably and continuously at the maximum speed.