Under the background of protecting the linear heritage of south China historical trail and developing historical trail tourism in Guangdong. As an important part of the construction of the historical trail travel path, the spatial sign system, through the user evaluation and analysis of the existing guide system (registered signs, positioning signs, guiding signs, interpreting signs and management signs), discusses the satisfaction of design optimization strategy for tourists' multi-dimensional needs. This paper selects 14 sample points of Xijing historical trail, uses SD-SBE method to organize expert group and public group to evaluate the samples respectively, uses SPSS software to compare and analyze the statistical scores, and finds out the reasons and countermeasures for the differences between experts and the public, so as to make the design of historical trail sign system more scientific and reasonable. The evaluation results indicate that there are great differences between the expert group and the public group in the evaluation scores of tourist perception, use function, direction guidance, node placement, rescue function and other related factors of the sign system sample. The above five factors should be placed emphasis on the design of historical trail sign system to better meet the use needs of tourists.