The invention discloses a bottom die lifting and double-side positioning linkage mechanism. The mechanism is mounted on a bottle blowing machine, and comprises a frame, a film blowing component and a driving mechanism, wherein the film blowing component comprises a left die, a right die and a bottom die; the bottle blowing machine also comprises a positioning mechanism; the driving mechanism comprises a rotating shaft, a cam which is fixedly connected with the lower part of the rotating shaft and on which a chute extending along the vertical direction is formed, and a power source; a supporting part and a pulley which can slide along the extension direction of the chute are respectively formed on the upper part and the lower part of the bottom die; the positioning mechanism comprises a driving connecting block which is fixedly arranged on the rotating shaft, multiple driven connecting blocks matched with the driving connecting block, and multiple slide blocks which are arranged along the horizontal direction in a sliding mode; and when the die is assembled, a gap is formed between the supporting part and the frame, and the slide blocks are inserted into the gap and are pressed against the supporting part and the frame. According to the technical scheme, the vertical sliding of the bottom die and the positioning of the positioning mechanism can be realized just by adopting one power source, so that the energy is saved, and the volume of the equipment is reduced.