Microstructures and mechanical properties of Mg-Gd-Y-Nd-Zr magnesium alloy after multi-directional forging were studied by metallographic observation and performance tests. The results show that, the microstructure of as-cast alloy is non-uniform, the composition segregation is serious and the mechanical properties are poor. Most of the eutectic microstructures are broken down after homogenization treatment. Dynamic recrystallization of the alloy occurres after multi-directional forging and the hardness and...