The invention discloses an ore grinding technology production method using hard rocks as an ore grinding medium. The production method is characterized by comprising steps of grading of the hard rocks discharged by an autogenous/semi-autogenous mill, transport of the hard rocks used as the ore grinding medium, storage, quantitative feeding of the hard rocks into a ball mill and a vertical type regrinding mill as well as a bypass transport system for returning redundant hard rocks to the autogenous/semi-autogenous mill, the hard rocks discharged by the autogenous/semi-autogenous mill can be fed into the ball mill and the regrinding mill automatically, regularly, quantitatively and stably according to a set value, the hard rock medium filling ratio is stabilized, ore grinding effects of the ball mill and the regrinding mill are fully realized, and the redundant hard rocks can be directly returned to the autogenous/semi-autogenous mill or returned to the autogenous/semi-autogenous mill after being broken, so that pollution and influence of iron on ore grinding products are reduced, and improvement on indexes for subsequent grading operation is facilitated.