The invention discloses a tire mold simulator, comprising a simulator body of an annular structure, wherein a groove is formed in an inner wall surface at a position, where the simulator body corresponds to a finally installed pattern block, along a circumference direction, and the radian of the groove is greater than that of the corresponding pattern block; the bottom surface of the groove is provided with a positioning groove along the radial direction of the simulator body, a positioning block is embedded in the positioning groove, and the positioning block is connected with the simulator body by a connecting device. According to the tire mold simulator, by forming the groove and the positioning groove and arranging the corresponding positioning block, the positioning accuracy of the pattern block in the simulator is improved.