To further improve the clinical application of magnesium alloys as biomedical materials, a superhydrophobic (SH) layered double hydroxide (LDH) film was prepared on the surface of a ZK60 magnesium alloy by an electric field-assisted method to improve the corrosion resistance. The surface composition and morphology of the film were analysed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The experimental results show that the main components of the film surface are calcium myristate (Ca[CH 3 (CH 2 ) 12 COO] 2 ) and Mg-Mn LDH (Mg 6 Mn 2 (OH) 16 CO 3 · 4H 2 O). The corrosion resistance of the film was characterized by electrochemical and contact angle tests. Under the optimal preparation process, the contact angle of the superhydrophobic film sample reaches 152.5°, and the corrosion current density decreases by approximately 2 orders of magnitude compared with the substrate, significantly slowing the degradation rate of the magnesium alloy substrate in simulated body fluid (SBF).