Adjustable sapphire cutting machine

The utility model discloses an adjustable sapphire cutting machine which comprises a machine table, a machine frame is fixed to the top end of the machine table, a rotary table driven by a first motor to rotate is arranged above the machine table, and fixing mechanisms symmetrically distributed in a cross shape are arranged at the top end of the rotary table. The first motor drives the rotary table to rotate, so that sapphire on one set of fixing mechanisms at the top end of the rotary table can be processed, meanwhile, sapphire finished products can be taken out or sapphire raw materials can be fixed on the other three sets of fixing mechanisms, the processing efficiency is improved, the screw rod is driven to rotate through the second motor, and the machining efficiency is improved. According to the sapphire raw material cutting device, the threaded block on the threaded rod drives the top plate to move, the cutting knife is adjusted to a proper position according to the to-be-cut position of a sapphire raw