JD-S3A, JD-S4A Two step fully auto-loader bottle blowing machine is improved on bases of JD-S3, JD-S4 bottle blowing machine. It is the most advanced and highly developed technology two-step fully auto-loader bottle blowing machine in the world. The machines have won a number of invention patents. JD-S4A two step bottle blowing machine has four cylinders. The capacity can reach 2200-2400B/H for 500ml bottle. Far-infrared auto-loader rotary heater now is improved on the basis of JD-S4 model manually putting perform, we only need to put all the performs into the loader, dispatch the perform into the heater through the upper-loader, go one round to the exit after heating, and take the performs to the closed mould by hand for blowing, and the blew bottles will come out automatically. It specialized in the production of blowing the plastic container (PET/PMMA/PS), it has small size, low energy consumption rate, high efficiency, low investment, easy to operate and maintain.