Aimed at the problem of cleaning water-surface garbage in small rivers, artificial lakes and water playgrounds, a kind of miniature clean-up robot with flexible operation, high efficiency and good appearance is proposed. The structure of the robot was designed, including hull, garbage collection bin, power device, salvaging device, control cabin and so on. The prototype is made and placed in indoor pool and artificial lake for testing. The test results prove that the robot can quickly reach the location of surface-water garbage in narrow water area or shallow water area with aquatics, then it can salvage floating garbage into the garbage collection bin, and take it to the designated location. The inexpensive robot with simple structure has a certain practical value and market prospects.