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In this study, a nanoscale 3D porous structure is rapidly synthesized on the surface of a Zr-based BMG by dealloying in solutions containing Cl− and F−. The influence of the porous surface structure the electrolyte on the preparation of the porous surface structure is studied. The Zr-based BMG is more likely to be passivated when F− is added to the HCl solution. The corrosion potential gap between the five components in the alloy increases after the addition of F−. The phase transformation and structure formation of a Zr-based BMG during dealloying are studied. The main dissolved elements in the dealloying process are Zr, Ti, and Al. Cu 10 Zr 7 , Zr 2 Ni 7 and AlTi 3 are the main crystal phases after dealloying, but the Zr-based BMG remains dominated by amorphous phases. The formation of the porous structure can be divided into two stages, the pitting corrosion process and the dealloying process, and these two processes are dominated by Cl− and F−, respectively. A porous surface structure is beneficial to improve the biomineralization activity of Zr-based BMGs. • A method for quickly synthesizing porous structure on the Zr-based BMGs surface has been developed. • The main process of the porous structure formation is the pitting corrosion and the dealloying. • The porous structure is beneficial to improve the biomineralization activity of Zr-based BMGs. [ABSTRACT FROM AUTHOR]