China hasimplemented the policy of sitting college entrance examination locally since the year of 2013，which protects the equal access to higher education of those eligible migrant children. However，uneven thresholds in sitting college entrance examination locally among different regions remain to be one major problem. Some provinces set the threshold too high，and specific provinces have not opened up access to four-year colleges for migrant children. This article compares policies of sitting college entrance examination locally in different areas and points out the real predicaments beneath the policy difference. Policy suggestions are then proposed to further loosen restrictions in sitting college entrance examination locally and promote equity in college entrance examination.