Textile Technology is the branch where the making of thread (धागा) and all types of fabrics such as shirts, pants, T-shirts, suits, ladies garments, gents garments, innerwear, socks, curtains, sofa covers, bed sheets, towels, shoe covers, and even car interiors are taught.

The Department of Textile Technology at Government Polytechnic Hisar was started in 1995 as a 4-year sandwich course and now offers a three-year Diploma Course in Textile Technology with an intake of 60 + 6 students per year. It is the oldest and largest Textile Technology department among polytechnics in Haryana. The department is equipped with modern laboratories including Spinning Lab, Weaving Labs, Knitting Lab, Textile Testing Lab, Fabric Analysis Lab, Garment Labs, and Dyeing Lab.

After completing the diploma in Textile Technology, students are placed in government and banking sectors as well as reputed industries such as DCM Limited (Hisar), Vardhman Textiles Limited, Raymond Limited, Sports King (Ludhiana), Manohar Filaments, JCT Limited, GBTL (Bhiwani), Nahar Group of Industries, Trident Limited, HP Cotton Mills Limited, RSWM Limited, Devgiri Industries, Kapoor Industries, Golden Terry Towel, Sunny Exports, Shahi Exports, Mahajan Exports, SGS, Bureau Veritas, Diamond Exports, Duke Limited, Sitaram Spinners Limited (Hyderabad), Nike, Reebok, Monte Carlo, and Jockey, with salary packages ranging from ₹15,000 to ₹24,000 per month.