MG-PP 2000 automatic stretch blow molding machine with four cavities is specially designed for hospital and dairy product package because the purity of the blowing air is the most outstanding point of the machine. Firstly, its transmission parts are made of stainless steel. Then STATIC DUST-REMOVING SYSTEM removes tiny dust from performs in the course of automatic conveyor sending preforms. Special medicinal air filtering system, named highly-efficient dust-removing filter, purifies blowing air completely so as to ensure the shaping bottle inside clean during blowing air into performs. Long preform baking tunnel meets requirements of GRADUAL HEATING to have heating quality of preforms and transfusion bottles. MG-PP 2000 overcomes many technical constrains and perfects its function of purifying the blowing air ideally, and now it has already become an ideal equipment for hospital liquid medicine package and most popular container for dairy products without pollution.