In this work, the Yb³⁺/Tm³⁺ co-doped layered perovskite CaBi₂Nb₂O₉ upconversion( UC )luminescent material were synthesized by the solid state method.Their erystalline structure, morphology and theUC luminescent properties were investigated through powder X-ay difiraction (XRD) , field emission scanningelectron mieroscopy (FESEM) and speetral analysis of UC emission.Under 980 nm exeitation, the CaBi₂Nb₂O₉: Yb³⁺/Tm³⁺ samples exhibits bright blue emission centered at 478 nm accompanied with typicalweak red emission at 647 and 695 nm and near infrared ( NR) emission at 783 nm, which ascribe to ¹G ₄ → ³ H ₆ 、¹ G₄ →³ F₄ 、³ F₃ →³ H₆  and ³ H₄ →³ H₆ transitions of Tm³⁺, respectively. Power dependence studies revealthat all the UC emissions are a two-photon process.The results indicate that CaBi₂Nb₂O₉ is a promisingcandidate for UC luminescent materials.