The work aims to summarize the research progress of solvent-free laminating technology of flexible package in respect of laminating equipment, adhesives and laminating technology. The characteristics and advantages of solvent-free laminating in the technological process, laminating parameters, application scope and economic benefit were expounded upon the comparison of solvent-free laminating technology and dry laminating technology. The current development status of solvent-free laminating equipment and adhesive of part of enterprises, and the research progress at home and abroad were introduced. Finally, the problems and challenges faced by the current solvent-free laminating technology were analyzed, and the development trend was proposed. The solvent-free laminating technology had not only obvious advantages in terms of productivity, but also huge economic benefit and environmental protection feature compared with the dry laminating technology. Solvent-free laminating technology is the main research and development direction of flexible package in the future because of its outstanding advantages and compliance with the current requirements of environmental protection.