Polysaccharides have accepted consideration because they are found in all living organisms such as, animals, plants, microorganisms and algae, as they have many essential biological activities for the organism, and have many pharmacological and biomedical actions, making them one of the most hopeful compounds in the fields of pharmaceutical and biomedicine. They are anti-inflammatory; wound healing feature, anticoagulant, antiviral, antioxidant, antidiabetes agent. Because of the multiple physical and chemical properties of polysaccharides, it is possible to change these properties into improved properties, as this is the basis of their various uses in the biomedical and pharmaceutical fields. In this review, the applications of polysaccharides in these areas will be clarified, with their potential as alternatives to proper treatments.