After the Geneva Agreement was signed, with the provision that Vietnam was temporarily divided into two regions,  taking the  17th parallel as a temporary military  boundary, the time for gathering, moving, and migrating between regions was also stipulated. Northern Vietnam  and  Southern  Vietnam  within  300  days.  The  regulations  from  the  Geneva Agreement  along  with  the  complicated  situation  of  the  Indochina  war  were  mainly  in Vietnam,  between  the  Viet  Minh  army  and  the  French  army.  This  made  the  migration extremely  complicated  and  caused  many  historical  consequences.  Migrants  from  North Vietnam  to  South  Vietnam  were  mainly  Catholics,  the  southern  government  led  by  Ngo Dinh  Diem  as  Prime  Minister  arranged  to  settle  them  in  some  areas  in  South  Vietnam. The issue of migrants also caused disturbances and had a strong impact on the Vietnam War  (1954 -1975).  The  research  is  based  on  historical  research  methods  and  actual historical methods to describe the migration process after the Geneva Agreement, thereby clarifying an important period of Vietnamese history. The issue of migration has also left important historical lessons in building socio-economic policies today in Vietnam