One of the significant drugs utilized in herbal medicine is Thespesia Populnea (TP) Linn.. For the purpose of ornament along with shade, it is cultivated. In the tropics, it blossoms all through the decennia. For the epidemic affections’ treatment like eczema, herpetic, guinea worm, ringworm, psoriasis, and scabies diseases, the plant TP is conventionally asserted to be helpful. In scabies and psoriasis, the oil made by boiling the ground bark in coconut oil is applied outwardly. To set up scientific data for its conventional claim as anti- psoriatic, the TP plant has been selected. The TP plant’s diverse parts are identified to have valuable medicinal features like purgative, Anti-Bacterial (AB), hepatoprotective, Anti-Inflammatory (AI), and Anti-Oxidant (AO) activities. Hence, TP, the TP’s pharmacological activity, along with TP’s Phytochemical (PC) had been illustrated, in this work. 2, 2-Diphenyl-1-Picryl-Hydrazyl-Hydrate (DPPH) activity of Ethanolic Extract (EE) of flowers of TP, In-Vitro AI by Human Red Blood Cell (HRBC) Membrane stabilization technique, along with the EE of TP on human erythrocyte is also examined in this work.