Color development method of meta-position aramid fiber and treating agent used in color development method

The invention discloses a treating agent used in a meta-aramid color developing method, the structural general formula of the treating agent is shown in the specification, the invention also discloses a meta-aramid color developing method by using the treating agent, the method comprises the following steps: firstly, using dimethyl sulfoxide and the like to swell aramid at a certain temperature, then soaking the aramid in a specific treating agent solution, a large amount of the treating agent is adsorbed on the aramid fiber, the treating agent is firmly combined on the fiber through a chemical reaction under a high-temperature condition, and finally, the treated aramid fiber is subjected to color development by using a diazonium salt solution. The method is simple to operate, the color chromatogram of the colored aramid fabric is rich, the color depth is convenient to adjust, the fixation rate is high, and various color fastnesses are excellent. 本发明公开了间位芳纶显色方法所用处理剂，处理剂的结构通式为：本发明还同时公开了利用上述处理剂进行的针对间位芳纶的显色方法，首先