By studying the language content contained in the visual information of trademarks, this paper intends to analyze the influence of verbal coding activated by the brain on long-term memory when people receive visual input, and explore ways to deepen people's memory of trademarks by using verbal coding, so as to provide ideas for designing trademarks with more recognition and memory. Based on the research of verbal coding and visual coding in psychology, this paper classifies the verbal coding when people memorize images, then analyzes the interaction and transformation between visual coding and verbal coding, explores the priority of different types of verbal coding when people remembering trademarks, and summarizes the positive and negative effects of language coding on trademark memory. Finally, it shows the advantages of verbal coding in judging trademark similarity disputes through actual cases. The process of long-term memory and recall of trademarks needs verbal coding to assist visual coding. The process of trademark design should not only consider the beauty and uniqueness of graphics, but also consider the logic and complexity of verbal coding formed in the process of memorizing, so that consumers' cognitive consensus and fuzzy directionality can be taken into account when promoting brands, thus improving the recognition degree of brand trademarks.