An annual herb with significant therapeutic value is called Cassia occidentalis L. As a result, C. occidentalis is employed as a traditional medicine to treat a variety of illnesses. C. occidentalis has medicinal potential because it contains phytochemicals, which are chemical components that have a specific physiological effect on the human body. All parts of medicinal plants contain phytochemicals that are naturally occurring and act as anti-infective defences. The phytochemical analyses of C. occidentalis reported in this review revealed the presence of alkaloids, flavonoids, phenolics/tannins, proteins/amino acids, saponins, anthraquinones, steroids, terpenoids, fats/oils, etc. The purpose of this review article is to give a general overview of the phytochemicals found in various solvent extracts of seeds, leaves, and flowers, such as PE, CH, ME, and acetone etc.