To package the agricultural products from a direct steam infused heating machine under continuous and automatic situation developed in this study that connects the direct steam infused heating system and the automatic tray packing machine. The device constructed a hopper, as a buffer tank, a screw feeder, a weighing-cell, a fill plate, a motor drive, and a load-cell based weighing controller. As the results, the speed profile could settle the questions on the physical properties of different products, the height which between the screw feeds and the weighing-cell, the time-lag of stopped feed effectively, and rising the precision in weighing and filling.