Based on the hot deformation technique, the microstructure and magnetic properties of DyF3-doped hot deformed NdFeB magnets were investigated. The results show that by hot deformation, the magnet obtains flat-shaped grains with obvious C-axis orientation characteristics, and the remanence is increased from 0.77 T of the precursor sintered magnet to 1.34 T, which is increased by nearly 74%. In addition, the hot deformation process can further diffuse DyF3 into the main phase of NdFeB, forming a (Nd, Dy)2Fe14B phase, and lead to reducing the coercivity loss. Electrochemical tests have shown that the hot deformation process increases the corrosion potential of the magnet and reduces the current density. When the deformation condition is 800 ℃/70%, the magnet has the best comprehensive magnetic and electrochemical properties, and its magnetic properties can reach: Br=1.34 T, Hcj=1225 kA/m and (BH)max=286 kJ/m3.