High light steam auxiliary forming technology is used high temperature steam, dang injection machine collection die Hou injected high temperature steam, first put mold temperature improve to a set of temperature value, then began to die cavity injection plastic, in injection machine completed insurance pressure Hou quickly injected cooling water or frozen water, makes of mold in short time within down to a a set of temperature value Hou open die, again to mold blow into air put residual of cold water blow go, completed a cycle of injection process. Control through this rapid cooling and heating of plastic forming defects of plastic parts can be completely solved, greatly improving production efficiency