The invention discloses a production die for opened profiles and relates to the technical field of production of profiles. A cleaver divider is arranged at a lower die inlet end at the center of a graph formed by surrounding of an extrusion hole, and the cleaver divider protrudes out of a plane of the lower die inlet end and stretches into a guide hole of an upper die. The die can effectively propel metal to flow to a place needing to be filled, and can avoid forming of a dead zone caused by accumulation of metal, thus being favorable for profile forming. Since metal accumulation is avoided, stress of a cantilever part of the lower die is relieved to a certain extent, the service life of the die is greatly prolonged, and compared with common dies, the extrusion pressure is reduced to a certain extent, and therefore, the production die is especially suitable for producing opened profiles.