The main goal of this research is to introduce a new form of generalized Hermite-Hadamard and Simpson type inequalities utilizing Riemann-Liouville fractional integral by a new class of preinvex functions which is known as strongly generalized (φ, h, s)-preinvex functions in the second sense. It is observed that the derived inequalities are generalizations of the inequalities obtained by W. Liu, W. Wen (Filomat 30(2):333-342, 2016).