Metal-organic frameworks with chiral feature (chirMOFs) are attracting great attention on circularly polarized luminescence (CPL). However, developing new efficient strategy to achieve or improve CPL properties is an urgent task. Herein, new chiral MOF thin films prepared by liquid-phase epitaxial layer by layer (lbl) growth method (SURchirMOF) are composed of D- or L-camphorate (D/Lcam) and aminopyrazine (Pr-NH₂) by using liquid phase epitaxial layer by layer (lbl) method. The resulted Zn₂(D/Lcam)₂Pr-NH₂ SURchirMOF shows strong chirality and luminescence but weak CPL emission at 390 nm. After lbl modifying a dye molecule FluoresceinIsothiocyanate (FITC), the chiroptical Zn₂(D/Lcam)₂Pr-NH-FITC SURchirMOFs with ~7 times CPL signal improvement and ~3 times g_lum value amplification are obtained. This work provides a new strategy to develop chiral MOF thin films for CPL improvement using lbl grafting approach.