In order to fabricate microstructure of stainless steel,the electrochemical micromachining (EMM) with laser masking surface modification for 304 stainless steel was proposed.A device of EMM with laser surface modification was developed,and the corresponding experiments were carried out.Firstly,fiber laser was used to mark the pattern on the surface of 304 stainless steel.The marking pattern was analyzed by X ray photoelectron spectroscopy (XPS).It is found that there are the iron oxide and chromium oxide on the surface of stainless steel,and the marking pattern has corrosion resistance.Secondly,the complex micro structures can be fabricated by EMM with laser surface modification,since the marking patterns on the surface of stainless steel play a protective role in the subsequent EMM under the appropriate machining parameters.At last,the shape and the roughness of the samples were measured by scanning electron microscope (SEM) and optical profilometer.The results show that the rapid fabrication of microstructures on the surface of 304 stainless steel can be achieved by EMM with laser masking,which has a good prospect in the field of micro machining.