Chiral organic-inorganic metal halides (OIMHs) have emerged as a new class of promising circularly polarized luminescence (CPL) materials owing to their structural tunability and fascinating optoelectronic properties. However, the development of high-performance chiral hybrid OIMHs remains a critical challenge, largely attributed to the absence of effective strategies for modulating chiroptical activity. Herein, we present enantiomeric hybrid manganese bromides, denoted as /-DACAMnBr, featuring a one-dimensional chain structure alternately coordinated by organic cations edge-sharing MnOBr octahedra, which establishes a robust chiral transfer pathway from organic cations to inorganic emissive centers. This structural design synergizes with the high intrinsic emission efficiency of Mn centers to achieve intense orange CPL at 626 nm, yielding a remarkable luminescence dissymmetry factor ( ) of 0.292 for -DACAMnBr, which surpasses most reported chiral OIHMs by 1-3 orders of magnitude. Remarkably, a positive magneto-chiroptical effect under a 1.6 T magnetic field amplifies the value to 0.321 at room temperature, demonstrating the first example of magnetic-field-enhanced CPL in lead-free OIMHs. The practical viability is further evidenced by -DACAMnBr-based circularly polarized light-emitting diodes exhibiting a strong CPL signal at 620 nm with a of 6.4 × 10, alongside single-crystal photodetectors achieving a switching ratio of 7.72. These findings contribute valuable insights for amplifying the chiroptical activity of hybrid OIMHs a strategy of chiral cation coordination, which may pave the way for the development of effective CPL materials toward diverse applications in the future.