Trust is a common phenomenon in social life. Trust behavior includes the interactive game between the principal and the trustee. Its structure includes three dimensions: subjective trust, transcendental trust and behavioral trust. Factors affecting trust behavior include beliefs about others' credibility, social preferences, and risk bias. At present, the processing of the neural mechanism of trust behavior mainly includes three aspects: prefrontal cortex, theoretical network of mind and neurohormones. In the future, researchers can pay attention to the effect of network factors on trust behavior and explore the theoretical integration of human trust behavior.