As methods of preparation, many technical such as degradation of lignocellulose materials, organic synthesis, the reinforcement of composites et al. have been introduced into self-bonding technology. According to different treatment, pretreatment methods have been divided into three categories: Physical method, chemical method and biological method. According to different mechanisms, each method is further classified. The types and action mechanism of pretreatment were summarized. Physical pretreatment usually have various degrees impact on the bonding strength but weak controllability, while chemical pretreatment have obvious effect on the bonding strength increased but serious pollution. Biological pretreatment is a promising but immature technology. By comparing the advantages and disadvantages of different methods, Feasibility of combined application of different methods is analyzed. Finally, the development foreground of pretreatment techniques in self-bonding composites is predicted based on the current research.