In the current scenario of industrialization the important of ecological botanical and preservation of ‘’bio-diversity’’ has became more intense and alarming thought every nation has enlarge it’s ‘’bio-diversity’’, decline in the number and verity of living organism has lead to international concern on the convention on ‘’Bio-diversity’’. That has embarked positive development in this sector.
Langtang valley is very popular for botanical trek. It is known as the best trip and tour for botanical trip. National park of the Langtang is in north of central Nepal of Kathmandu. It was designated as the first Himalayan National park in (1970/1971). people of the Langtang valley are mostly depended on park resources for their daily basic.