The invention relates to a brake device, in particular to a mold brake device. The mold brake device is capable of preventing a template from loosening in the moving process so as to avoid deviation during the molding of the template and convenient to use. According to the technical scheme, the mold brake device comprises a sliding sleeve, fixing rods, first supporting rods, first springs, first nuts and the like, wherein first sliding chutes with guiding functions are formed in the upper parts of the left side and the right side of the sliding sleeve; the first supporting rods are arranged onthe upper parts of the left side surface and the right side surface of the outer side of the sliding sleeve; and the first nuts are embedded in the middles of the first supporting rods. According tothe mold brake device, the sliding sleeve sleeves a pull rod and is in contact with the template, and first screws are rotated forwards to move inwards to enable the fixing rods to move inwards to make contact with the pull rod to fix the sliding sleeve, so that the template is fixed, and the deviation in the molding process of the mold caused by the loosening of the template in the moving processis avoided; and the sliding sleeve can be further stably fixed on the pull rod through the action of clamping plates.