First of all, we should know what trademark approximation is. Trademark approximation refers to characters, graphics, letters, numbers, three-dimensional signs, color combinations, sounds and other elements of trademarks. Although there are some differences in pronunciation, vision, meaning or arrangement order, the overall difference is not great. When used on the same or similar goods or services, it is easy to confuse the relevant public with the source of the goods or services. Word mark's approximation mainly considers three aspects: shape, sound and meaning, graphic trademarks mainly consider composition, appearance and coloring, and combined trademarks should consider both the overall expression and the significant parts. The judgment of trademark similarity should be based on the general concern of the relevant public about the shape, sound, meaning and overall expression of the trademark itself, and adopt the method of combining isolated comparison, overall comparison and major comparison to judge whether the trademark logo itself is the same or similar. Isolation and comparison means that when judging the similarity of trademarks, trademarks cannot be placed side by side for comparison, but can only be isolated and carried out separately. However, when examining trademarks, only direct and non-isolated comparisons can be made. Therefore, isolated observation should simulate the scene of consumers buying goods and services as much as possible to judge. Overall comparison refers to comparing two trademarks as a whole, and local judgment cannot be used instead of overall judgment. The comparison of important parts refers to the part of a trademark that should be clearly marked. The general attention of the relevant public can be understood as the attention paid by consumers with general knowledge and experience when purchasing or accepting goods or services.