PURPOSE: A curvature variable frame for manufacturing concrete block is provided to shorten construction period and to reduce manufacturing cost. CONSTITUTION: A curvature variable frame for manufacturing a concrete block comprises: a first base frame(1); a second base frame(2) providing a curvature of the concrete block; a first side frame which is supported with a support(4) at one side of the second base frame; a second side frame which is supported with an operation side support(11) at the opposite side of the second base frame; a truck(8) moving back along a rail(7); a guide truck(13) for guiding the rail for moving; a first connection member for fixing position of the first side frame; and a second connection member for fixing position of the second side frame at one side.
