1,2-Disubstituted imidazoline, such as 1-stearoly aminoethyl-2- heptadecyl imidazoline (SHI), 1-stearoyl dis (aminoethyl)-2- heptadecyl imidazoline(SDI) and 1-stearoyl tris (aminoethyl) -2-heptadecyl imidazoline(STI) were synthesized from stearic acid with polyalkylene polyamine, and then water-soluble 1,2-disubstituted imidazolinium salts, such as 1-stearoyl aminoethyl-1-glycidyl -2-heptadecyl imidazolinium chloride(SHIC), 1-stearoyl dis(aminoethyl)-1-glycidyl-2-heptadecyl imidazolinium chloride(STIC), 1-stearoyl aminoethyl-2-heptadecyl imidazolinium chloride(SAIC) and 1-stearoyl aminoethyl-1-benzyl-2-heptadecyl imidazolinium chloride(SBIC) were obtained by alkylating 1,2-disubstituted imidazoline with epichlorohydrin, hydrochloric acid and benzyl chloride. It was found that SHIC, SDIC and STIC could be used as the durable softening and water-repellenting agent, from the results of the measurements of the water repellency of fabrics treated with SHIC, SDIC, STIC, SAIC and SBIC. The structures of these compounds were also determined by elemental analyses and IR spectra.