In 1993, the Forestry Department of Thailand conducted a more thorough survey including the surrounding area, and recommended that it become a national park.

The national park covering 62,437 rai ~ 100 square kilometres (39 sq mi)[2] was created on 19 September 1994, which was officially gazetted in 2007.

The steep cliff at the 846 m high Sut Phan Din viewpoint affords a view into a valley of the Sonthi River and the Sap Langka Wildlife Sanctuary.

[6] Bua Sawan Field, has only a plant is called "Siam tulip" because it is a flower that is related to various ginger species such as turmeric.

[7] Plants in Pa Hin Ngam National Park have very big area and full of green, there are many kinds of the plan.