Objective:To explore the non-Shenzhen household register students' implicit social identity.Methods:Altogether 119 junior school students,including 87 Shenzhen household register students and 32 non-household register students,were investigated with self-region Implicit Association Test(IAT1) and region-favoritism Implicit Association Test(IAT2) designed according to the social identity theory.Results:(1)In IAT1 of Shenzhen household register students,the discordant reaction time(1242?271)ms was longer than the accordant reaction time(890?165)ms.In IAT1 of non-household register students,the discordant reaction time(1016?127)ms was shorter than the accordant reaction time(1097?196)ms.The implicit effect of self-region remarkably existed in Shenzhen household register students,but not in the non-household register students.In IAT2 of Shenzhen household register students,the discordant reaction time(966?185)ms was longer than the accordant reaction time(789?108)ms.In IAT2 of non-household register students,the discordant reaction time(1021?133)ms was also longer than the accordant reaction time(819?84)ms.And the region-favoritism IAT had implicit effect in both kinds of students.(2)To the non-Shenzhen household register sample,those whose father's job was mental work had higher score in IAT1 than those whose father's job was manual labour(P