Abstract: Using a self-developed electromagnetic energy grain refinement device, 1350 aluminum alloy melt was treated with a pulsed magnetic field. The effects of adding different mass fractions（0.3%, 0.15%） of Al-5 Ti-B refiner and applying a pulsed magnetic field under conditions where the amount of refiner were half reduced, on the solidification structure and properties of the 1350 aluminum alloy cast-rolled plate were investigated. The results show that when the pulsed magnetic field is applied while the refiner addition is 0.15%, the grain refinement effect of the cast-rolled plate is superior to that with the normal addition of the refiner（0.3%）. Simultaneously, the mechanical properties of the plate with half refiner and applied pulsed magnetic field are not significantly different from those with normal refiner addition. The findings indicate that the energy from pulsed magnetic fields decreases the activation energy and enhances the nucleation rate, thereby refining the microstructure of 1350 aluminum alloy. Therefore, applying a pulsed magnetic field can significantly reduce the amount of Al-5 Ti-B refiner, which not only lowers the production costs but also helps improve melt purity and reduces defects in the cast-rolling process.