Double layer normal pressure hank yarn dyeing machine with more larger capacity and more lower liquor ration than single layer hank dyeing machine, and also save the space of factory. It is also suitable for bleaching, refining, dyeing, washing and post-treating various kinds of yarns, such as spindled shiny fiber, single spun yarn, rayon, mercerized cotton yarn, spun silk, pure silk, fancy yarn, cashmere, etc.