This article first introduces the content of multi-sensory design theory, and secondly summarizes the relevant research status at home and abroad, and then analyzes the packaging design principles of children’s snacks based on children’s cognitive psychology, finally explored the design methods of children's snack packaging under the multi-sensory design theory from the visual sensory communication design, the tactile sensory communication design, the auditory sensory communication design and olfactory sensory communication design.