The 100-MeV PEFP proton linac is designed to have two proton beam extraction lines at the 20-MeV and 100MeV end, for users’ experiments. Each extraction line will house 5 to 6 beamlines. The beam optics for the proton beam transport line has been designed with the TRACE code. The optics design is such as to meet the users’ various requests of the beam size and intensity at the beam target for their experiments. To distribute the proton beam to the beamlines, an AC-type magnet has been designed to have a cyclic frequency of 15 Hz. We will describe the optics and magnet design for the 20MeV proton beam transport line.