Nanoporous-SnO₂ films were electrochemically prepared via anodizing of metallic tin electrodeposited on a cylindrical copper substrate using rotating cylinder electrode Technique. The effects of anodizing potential (4-7V), oxalic acid (OA) concentration (0.1-0.5M), time (10-20), and rotation speed (150-450 rpm) on the electrochemical activity of SnO₂ as an anode in degrading methylene blue (MB) were investigated. Results showed that increasing oxalic acid concentration gives better performance in degrading MB while increasing anodizing potential enhanced the electrode activity up to a potential of 5 V beyond which no enhancement of electrode activity towared MB degradation was noted. Longer time of anodizing has opposite effect while rotation speed enhanced the electrocatalytic activity of SnO₂. The best conditions of anodizing were potential of 5 V, 0.4M OA, 15 min, and 250 rpm in which MB removal was 87.6%. Structural morphology of SnO₂ prepared at the optimum conditions confirmed the conversion of tin to SnO₂ with free crack structure. These results demonstrate that adopting anodizing method with rotating cylinder technique to forming SnO₂ anodes is a promising strategy for constructing high-performance anodes suitable for treatment wastewaters.