Used to pull the sieve onto frames used in flour and semolina factories. The sieve should be taut on the frames. The better the sieve is stretched, the better the productivity. Two corners of the Sieve Stretching Machinee are fixed, and two opposite corners are movable. In a system with clamping tongs at the four corners, after the sieve frame is inserted into the slot, the sieves are attached to it and tightened from.