This paper describes the implementation of an integral sliding mode (ISM) based robust composite non-linear feedback (CNF) controller design for a single input single output (SISO), continuous linear time invariant (LTI) descriptor system with input saturation. This scheme combines the salient features of the CNF controller and the sliding mode controller i.e good transient behavior while tracking and matched disturbance rejection respectively. Also, this scheme guarantees a general reference tracking for the descriptor systems even in presence of input saturation. © 2018 IEEE.