The work aims to design an automatic packaging production line for rebar connecting sleeve with the common rebar connecting sleeve in the market as the research object in view of the problems such as high labor intensity, low production efficiency, and failure to meet market demand due to that the current marking, packaging and palletizing tasks of rebar connecting sleeves are manually completed. The idea of step-by-step marking and integrated packaging was used to formulate the overall design of the marking, packaging, and palletizing production line for the rebar connecting sleeve. UG was used to set up the 3D model of each section in the production line, and perform virtual assembly and simulation. The integrated production of marking, packaging and palletizing of 18- 32 mmsteel rebar connecting sleeves were realized by the packaging production line, with an efficiency of 120 bags/hour, which was 5 times higher than that by traditional manual method. The production line has a reasonable structure. Under the premise of ensuring the packaging quality, it greatly improves the packaging efficiency and reduces the packaging cost, and provides a solution for the automatic packaging of the rebar connecting sleeve.