The protective areas like National Parks, Wildlife Sanctuaries and reserve forests have attracted worldwide attention to study vegetation, floral diversity and other wild lives for their conservation, sustainable use and also for proper management of bio resources. Laokhowa wildlife sanctuary has most ideal habitat for Indian one horned rhinoceros and is one of its representative area in Brahmaputra flood plain. The sanctuary is one of the rich and ecological habitat for the wild variety of animals and plants species. The natural vegetation of the area is mainly contributed by forests of tall trees, grassland and wetland vegetation. The wood land provides food and shelter to a variety of animals and the grassland is the heaven for a variety of herbivores. Besides these the wetlands and aquatic bodies provides food and shelter to avifauna, fish fauna and other wildlife. The present paper deals with the vegetation present in the sanctuary. The vegetation comprises (a) Low alluvial savannah woodland (Salmariaalbizzia) (b) Western Wet alluvial grasslands (c) Riparian Fringing Forests (d) Barringtonia Swamp forests (e) Wet lands (f) Plantation areas (g) Degraded Forests. About 40sq km area is grass land; 6 sq km area is occupied by alluvial grass land in the sanctuary.