To discuss the difference of interpersonal trust among grassroots soldiers in demographic variables. The self-compiled interpersonal trust scale was used to measure and analyze 500 subjects. The conclusion is that there is no significant difference in each dimension and total score between military service and age, there is significant difference in gender factor in the dimension of trust ability, and the score of women is higher than that of men, and there is significant difference in the dimension of predictability. Soldiers in different marital states do not differ significantly in their total score, goodwill, moral character, and ability dimensions, but the married soldiers were significantly higher than the unmarried and divorced soldiers in the dimensions of kindness There was a significant difference in predictability between only children and non-only children. The scores of non-only children were higher than those of only children, which indicated that non-only children were more inclined to trust others.