The digital checkweigher metal detector combo integrates the function of the metal detection machine and the weight selection machine on a simple cantilever framework, which is convenient and effectively installed into the existing workshop, so that the space requirements of the production line are reduced to low, saving the installation cost. The simplified modular design of the automatic checkweigher metal detector combo provides solidity and durability for the harsh production environment, and at the same time does not affect accuracy or measuring reliability.