Full-automatic box forming machine for e-commerce express boxes. The case erector machine has a simple and compact structure, small footprint, easy and flexible to use, simple operation, one key start, fully automatic and efficient box forming, producing 30 boxes a minute. Specially designed to meet the needs of online stores shipping, eliminating the manual box forming step, replacing 2-3 workers and improving shipping efficiency. Compatible range includes the common express outer boxes in the market. such as usps large flat rate box, ups express box, mail boxes express, usps priority mail regional rate box.