Raising environmental awareness had forced researchers to explore the potential and implementation of environmentally friendly materials as alternatives for conventional materials. Environmentally friendly materials are biodegradable, safer, non-toxic, lightweight, cheap, and readily available. Arrowroot starch has a high content of amylose (~35.20%) which makes it suitable for better film production. Starch extracted from arrowroot rhizomes can be blended, plasticized with other polymers, or reinforced with fibres to improve their properties. The melt blended glycidyl methacrylate-grafted polylactide (PLA-g-GMA) and treated arrowroot fiber (TAF) treated with coupling agent developed PLA-g-GMA/TAF composite, which showed better properties than the PLA/AF composite. To the best of our knowledge, no comprehensive review paper was published on arrowroot fibres, starch biopolymer, and its biocomposites before. The present review focuses on recent works related to the properties of arrowroot fibres and starch, and their fabrication as biocomposites. The review also reveals the vast potential of arrowroot fibres and starch for food industries, medicines, textiles, biofuel, pulp, and paper-making industries, bioenergy, packaging, automotive, and many more.