High speed and accuracy check weigher is used to check the weight of packed bags and boxes and remove unqualified ones by rejection device. The fault alarm information is directly displayed in the text. The conveyor belt structure adopts an easy-to-disassemble design, which is convenient for disassembly, assembly, and cleaning. Equipped with rejection device, such as pneumatic pusher/ arm rejector/ blowing, etc. The check weigher can be equipped with an instant printing labeling machine to realize online labeling.