A process for dyeing of textile material using supercritical fluid, comprising: mixing dye materials in at least one suitable solvent to obtain at least one dye solution; pre-treating a surface of said textile material with an optimum quantity of said at least one dye solution to obtain a dye coated textile material, wherein said surface of said textile material is pre-treated with more than one dye solution to obtain a multi-color, multi shade coated textile material with desired design patterns as required, and wherein said surface of said textile material is pretreated with said at least one dye solution using any suitable coating process to obtain a desired thickness and concentration of said dye materials on said surface of said textile material; placing the dye coated textile material in a supercritical fluid dyeing vessel; adding said supercritical fluid into said supercritical fluid dyeing vessel at controlled temperature and pressure, wherein said process further comprises solubilizing said dye materials which are present on the surface of said dye coated textile material by the supercritical fluid and further diffusing said solubilized dye materials inside the surface, pores and capillaries of said dye coated textile material; and depressurizing said supercritical fluid dyeing vessel below supercritical condition to precipitate and entrap said dye materials in said dye coated textile material. mixing dye materials in at least one suitable solvent to obtain at least one dye solution; pre-treating a surface of said textile material with an optimum quantity of said at least one dye solution to obtain a dye coated textile material, wherein said surface of said textile material is pre-treated with more than one dye solution to obtain a multi-color, multi shade coated textile material with desired design patterns as required, and wherein said surface of said textile material is pretreated with said at least one dye solution using any suitable coating process to obtain a desired thickness and concentration of said dye materials on said surface of said textile material; wherein said surface of said textile material is pre-treated with more than one dye solution to obtain a multi-color, multi shade coated textile material with desired design patterns as required, and wherein said surface of said textile material is pretreated with said at least one dye solution using any suitable coating process to obtain a desired thickness and concentration of said dye materials on said surface of said textile material; placing the dye coated textile material in a supercritical fluid dyeing vessel; adding said supercritical fluid into said supercritical fluid dyeing vessel at controlled temperature and pressure, wherein said process further comprises solubilizing said dye materials which are present on the surface of said dye coated textile material by the supercritical fluid and further diffusing said solubilized dye materials inside the surface, pores and capillaries of said dye coated textile material; and depressurizing said supercritical fluid dyeing vessel below supercritical condition to precipitate and entrap said dye materials in said dye coated textile material.