The invention relates to the technical field of injection mold equipment, in particular to an injection mold without a draft and an injection molding method using the mold, an injection mold without a draft, the ejection system includes a push block, and the fixed There are steam flow passages around the mold cavity and the movable mold core. Through the steam flow passage, the movable mold core and the fixed mold cavity can be rapidly heated and cooled during mold closing and injection molding. The overall balanced and non-inclined ejection reduces the size of the original mold; an injection molding method for an injection mold without a draft, through the clamping and injection of the movable mold core and the fixed mold cavity with steam channels all around glue, heating, cooling, and mold opening, the product is heated rapidly first, and when the product is formed, it is in the process of holding pressure, and the fixed mold cavity and the movable mold core are rapidly cooled at the same time, which can reduce the production cost of the mold and avoid the product from being out of the mold If the slope is too small, the product will be whitened or stick to the mold, or if the angle is too large, the appearance and assembly will be affected.