We report an improved multiparameter exponential-type potential (MPETP) energy model for diatomic molecules. It is found that this potential is identical to the Tietz potential in the realm of diatomic molecules. The efficiency of the improved MPETP is clarified by simulating the internuclear interaction potential curve for the A ( 3 Π 1 ) state of the chlorine monofluoride molecule.chlorine monofluoride, improved multiparameter exponential-type potential, internuclear interaction potential