This paper examines how judges’ social background influence the tax litigation outcome. By collecting verdicts of corporate income tax in supreme administrative court from 2016 to 2018, the empirical result illustrates that judges’ social background are significantly related to the corporate income tax litigation. In addition, the enforcement of the Taxpayer Right Protection Act substantially enhances the probability of winning rate, which achieve the initial purpose of the law. Finally, we find that the specialized tax courts have differences between themselves, causing the appellants undertaking unstable risk of the litigation outcome inevitably.