Over the years, the Citrulluslanatus rind has been considered as waste and disposed ignoring the fact that it can be utilized as a value-added product and has many health benefits. The watermelon rind constitutes nearly a third of the watermelon weight. The evaluation of Citrulluslanatus (watermelon) rind as a possible raw material for a pharmaceutical and as a value added product of the fruit rind and this will encourage cultivation, utilization and possible application of water melon rind in the treatment of various diseases. The aim of this research work is to determine the functional group using FTIR and chemical components of aqueous extract of watermelon rind using Gas Chromatography–Mass Spectrophotometry (GC-MS). Dried powder of Citrulluslanatus (water melon) rind extracts was used for FTIR analysis. 10 mg of the dried extract powder was encapsulated in 100 mg of KBr pellet, was prepared to obtain a translucent sample discs. The powdered of Citrulluslanatus was loaded in FTIR analysis (Shimadzu, IR Affinity 1, Japan), having a Scan range from 400 to 4000 cm-1. While The phyto-constitutes of Citrulluslanatus (water melon) aqueous rind extract were determined by Gas Chromatography (Agilent 6890 series) coupled with HP-5MS column mass spectrometer at column temperature of 30°C and was heated to 300°C at 10°C for 5min. The helium was used as carrier gas at a flow of 1.0ml/min. The identification of the constituents of water melon rind aqueous extract was performed by matching their mass spectra and retention indices with those obtained from authentic samples and/or NSIT/Wiley spectra libraries, using different types of search (PBM/NIST/AMDIS) and available literature data. The FTIR analysis Citrilluslanatus aqueous rind extract shows different absorption band which indicated the characteristic peak of different functional groups such as OH, C=O C-O, H-N, C-H etc which are associated with phenols, ketones, flavonoids, aldehydes, amides, alkenes etc. while the Gas Chromatography-Mass spectrometry analysis of aqueous extract of watermelon rind reveals the presence of different fatty-acid, methyl ester and volatile organic compounds this includes Hexadecanoic acid,2-hydroxy-1-(hydroxymethyl)ethyl ester, Eicosane,2methyl-, 1-Hexadecanesulfonic acid,3,5-dichloro-2,6-dimethyl-4-pyridyl ester, 9,12-Octadecadienoic acid(Z,Z)-2,3-dihydroxypropyl ester, Estra-1,3,5(10)-trien-17β-ol etc. The finding showed that Citrilluslanatus aqueous rind extract have thirty-one (31) bioactive constituents of pharmacological important identified by GC-MS and FTIR analysis. These compounds from Citrilluslanatus rind can be used in pharmaceutical industry for development of novel lead drugs for management of diseases.