“九一八”事变后，东北变成了日本的殖民地。日伪对我华北移民出关采取了限制的措施，这使出关移民大减。更为主要的是，它使２０年代以来的移民运动被纳入了日本　侵略者的战争轨道，不能自由发展，因而这一时期的移民运动呈现出与事变前不同的特点。“九一八”事变后华北与东北间人口流动的实质是日本帝国主义对华北劳动力的强制性掠夺。　 After the “September 18” incident, the northeast became a Japanese colony. The measures taken by Japan and the Pupy to restrict the exit of my North China immigrants have greatly reduced the number of immigrants who have left their country. More importantly, since it allowed the immigration movement in the 1920s to be included in the Japanese aggressors’ war track and can not freely develop, the immigration movement of this period showed a different characteristic from the pre-incident. The essence of the population flow between North China and Northeast China after the September 18th Incident was the mandatory plunder by the Japanese imperialists of the labor force in North China. 