Abstract: In order to learn about the interpersonal trust of the senior high school students in countryside of Mulao Nationality, questionnaires of Interpersonal Trust Scale (ITS) and Faith in People Scale (FPS) were adopted to test 483 senior high school students in countryside of Mulao Nationality. The result shows that the general trust degree of the senior students in countryside of Mulao Nationality is at a rather high level; there are no remarkable differences in the interpersonal trust among different grades, genders and the students from single-parent families are interior to those from a normal families in this regard; and the differences are extremely remarkable in the FPS, the interpersonal trust of students from towns and cities is superior to those students from the countryside, and there are remarkable differences observed in ITS.