The　polarized　absorption,　emission　spectra　and　decay　time　measurements　of　Pr3+-doped　CaYAlO4　single　crystal　have　been　performed　at　room　temperature.　Based　on　the　Judd-Ofelt　theory,　the　spectroscopic　parameters　,　radiative　transition　probabilities,　radiative　lifetimes　and　branching　ratios　were　obtained.　The　stimulated　emission　cross-section,　fluorescence　lifetimes　and　the　quantum　efficiency　of　the　promising　laser　transition　were　also　calculated　and　compared　with　other　reported　crystals.　The　results　show　that　Pr3+:CaYAlO4　is　a　promising　candidate　for　visible　solid-state　laser　emission.