1, electrolyte is needed: electrochemical machining is realized by applying an electric field in the electrolyte, so a suitable electrolyte is needed.

2. Appropriate electrode is needed: the shape and size of the electrode should match the shape and size of the workpiece to ensure the machining effect.

3. Appropriate voltage and current are needed: the voltage and current should be appropriate to ensure the stability and efficiency of the machining process.

4. Appropriate processing conditions are needed: The processing conditions include the voltage, current, temperature, concentration and flow rate of the electrolyte, which need to be adjusted according to the specific processing tasks.

5. Need suitable processing equipment: Electrochemical processing needs special equipment, including power supply, electrodes, electrolytic cells, etc. These devices need stability, accuracy and reliability. Electrochemical machining of narrow cracks refers to a machining method that uses electrochemical machining technology to form very fine cracks on the surface of metal materials and realize micro-machining.