Introduction The carrier of Dengue fever which has been spread in Thailand is Aedes aegypti, Abate can eliminate Aedes aegypti's larvae but its limitation cannot eliminate Aedes aegypti's pupae. With this, we wanted to produce the product from natural crude extracts that can eliminate both Aedes aegypti's larvae and pupae. we selected cassia fistula L to produce the product because there are Anthraquinone and Tannin in its funiculus and pericarp that can kill these insects. Moreover, this plant, Cassia fistula L is easily found in Thaluand especially in summer.