A quartz stone plate machining process includes the following steps that order information is input into a control system; a board with a two-dimensional code is arranged on a feeding platform; a scanning gun scans the two-dimensional code, and the two-dimensional code information is matched with the order information; the board is conveyed to a cutting all-in-one machine, and the cutting all-in-one machine cuts the board into deck plates and edgings according to the order information; the plates subjected to transverse cutting are overturned, and the reverse surfaces of the plates are upward; longitudinal cutting and/or inclined cutting are/is conducted on the plates according to the order information; the cut plates are cleaned and then transferred to a storage platform; the cut plates are bonded and cured according to the order information; the bonded and cured plates are subjected to deck and waterstop edge grinding as well as end surface grinding and hole milling; and finished products are collected and warehoused after quality testing. The quartz stone plate machining process is suitable for large-scale production, and greatly improves manufacturing efficiency. The two-dimensional code is added to the board, and after the board is taken, the two-dimensional code information is scanned and matched with the order information, so that errors are prevented.