With the deepening of college English teaching and testing in China, formative assessment has been paid greater and greater attention by teachers It mainly includes assessment conducted by teachers, students’ selfassessment and so on However，in present college English teaching, most of the teachers ignore the students’ selfassessment Actually students’ selfassessment is of vital importance in formative assessment, and students can have autocriticism and selfadjustment At first, the present state and the disadvantages in the present college English teaching assessment are analyzed theoretically Then，through classroom experiments, this study shows that students’ selfassessment plays an important role in college English teaching It can not only promote students’ autonomous learning ability and ability to use English in a wellrounded way but also improve students’ lifelong learning ability