The invention discloses a printing process and a spraying machine applied to the process of the printing process. The printing process comprises the following steps: performing pretreatment, pre-shrinking, pre-shaping, performing reduction, printing, ageing, performing water-washing, shaping, and inspecting finished products, wherein the fabric is subjected to expansion treatment after reduction,and the printed fabric is subjected to supercooled river treatment. The printing process has the following advantages and effects: the fabric is subjected to expansion treatment before printing, poresin the fabric fiber structure can be expanded, dye molecules can be permeated into the fiber easily during fabric printing, the subsequent supercooled river treatment enables to the fiber to be shrunk, the binding force between the dye molecules and the fiber is enhanced, and the dye is not liable to remove in the water-washing and wearing processes, so that the aim of reducing the adverse effecton human health by the dye is fulfilled.