A die cutter supply system, comprising: a frame and a die cutter storage rack and a drive device disposed within the frame, wherein an exit-entry portion for die cutters to enter and exit the storage rack are disposed at back and front sides of the frame respectively, a plurality of die cutters are stacked up and down in different layers in the storage rack, guide columns are respectively disposed at four corners of the frame, guide sleeves slidably cooperating with the guide columns are disposed on the storage rack, and the drive device drives the storage rack up and down along the guide columns; characterised in that the drive device comprises a motor gear box provided with a dual output shaft, driving belt wheels, a driven shaft, driven bearings, driven belt wheels and synchronous belts, the motor gear box is disposed on the top of the frame, two driving belt wheels are respectively disposed on both ends of the output shaft, two driven bearings are fixed at a lower portion of the frame and located below the storage rack, the driven shaft is penetrated through the two driven bearings, the driven belt wheels are disposed on both ends of the driven shaft, the driving belt wheels drive the driven belt wheels to rotate by the synchronous belts, a synchronous belt is disposed on left and right sides of the frame respectively, each synchronous belt is provided with a cutter rack fixing plate, one end of the cutter rack fixing plate is fixed on the synchronous belt, and the other end is fixed on the storage rack at this side, wherein a plurality of slideways for placing die cutters are disposed up and down at right and left sides of the storage rack respectively, a die cutter locking device for positioning a die cutter in a slideway is disposed at the right side of the storage rack, the die cutter locking device comprises a locking cylinder, a locking operation rod, locking bearings, driving rods, locking rods, locking rod rotary shafts, and rotary shaft fixing rods, the locking cylinder is fixed on an upper portion of the storage rack, the locking operation rod is fixedly connected with an output shaft of the locking cylinder, the locking operation rod is penetrated through two locking bearings, the two locking bearings are fixed on the storage rack and respectively located at both ends of the locking operation rod, the locking operation rod is slid up and down along the locking bearings under the drive of the locking cylinder, the rotary shaft fixing rod is fixed at a side of the storage rack, the rotary shaft fixing rod is provided with a plurality of avoiding holes corresponding to a placement position of each layer of die cutter, the driving rods, the locking rods and the locking rod rotary shafts are respectively disposed at a side of the placement position of each layer of die cutter by sets, the locking rods are provided with a waist-shaped hole, a rotary shaft hole, and an arc-shaped portion, the locking rod rotary shafts are penetrated through the rotary shaft fixing rod and the rotary shaft holes of the locking rods to movably connect the locking rods in the avoiding hole of the locking rods, one end of the driving rods is fixed on the locking rods, the other end is movably inserted into the waist-shaped holes of the locking rods, the arc-shaped portion of the locking rods is fitted into limiting grooves of side edges of the die cutters and the locking operation rod slides up and down and thus drives the locking rods to rotate around the locking rod rotary shafts through the driving rods.