The invention relates to an internal grinding abrasion wheel machining method and pre-machining device. The internal grinding abrasion wheel machining method comprises the following steps that mixingis performed, specifically, internal grinding abrasion wheel billet raw materials are mixed according to a set proportion for standby use; compression moulding is performed, specifically, a prepared mixed material is loaded into a die for performing compression moulding; drying is performed, specifically, a compression moulded internal grinding abrasion wheel billet is transferred into a drying oven for drying; sintering is performed, specifically, the dried internal grinding abrasion wheel billet is placed into a furnace for sintering; and pre-machining is performed, specifically, the internal grinding abrasion wheel billet is clamped on an internal grinding abrasion wheel billet clamping device after the internal grinding abrasion wheel billet is dried and after the internal grinding abrasion wheel billet is sintered, and the internal grinding abrasion wheel billet is ground through a grinding device, so that the radial size of the internal grinding abrasion wheel billet is reduced.The internal grinding abrasion wheel billet clamping device is used for clamping the internal grinding abrasion wheel billet and driving the internal grinding abrasion wheel billet to rotate, the machining efficiency of mechanical machining after sintering can be improved easily, and wasting of raw materials is reduced.