<p>In the process of Electrochemical discharge machining (ECDM), the timely renewal and supplement of the inter-electrode electrolyte play a crucial role in ensuring a stable discharge machining process. For this reason, this study adopts the method of internal liquid supply-assisted electrochemical discharge machining using multi-channel tube electrodes to conduct machining research on zirconia ceramic materials. A comparative analysis was carried out on the machining quality of multi-channel tube electrodes and single-channel tube electrodes under the condition of internal liquid supply assistance. The results show that under the internal liquid supply-assisted machining condition, the machining depth of the multi-channel tube electrode is increased by 16.27% compared with that of the single-channel tube electrode, and the Material Removal Rate (MRR) is increased by 14.01%. Ansys simulation software was used to simulate the flow field distribution of the internal supplied electrolyte inside the single-channel tube electrode, inside the multi-channel tube electrode, and in the inter-electrode gap, which revealed the excellent machining effect and liquid supply mechanism of the multi-channel tube electrode. Subsequently, a single-factor experiment method was used to conduct experimental research on the internal liquid supply-assisted electrochemical discharge machining of zirconia ceramics using multi-channel tube electrodes, providing a basis for parameter selection for the subsequent research on internal liquid supply-assisted ECDM of zirconia ceramics using multi-channel tube electrodes.</p>