回複：辦niw的140期間是否可以換工作

Yes. NIW does not need employer to support you. You can only file I-140 right now. But, if you file I-140 and I-485 at the same time, you may not change your job after 180 day of getting the recipt of I485. Also, the new job which you get should be in the same field or similar job.