Abstract: There are many phenomena of hidden extended custody in China, which can be divided into three species on the manifestations, extending detention period, borrowing detention period and indefinite detention period. Many reasons cause hidden extended custody. It mainly includes the judicial concept of investigators and the judiciary deviation, the legal shortcomings, the relevant mechanism that has not been set up, the high rate of custody, and the unreasonable allocation of judicial resource. To solve the problem of hidden extended custody, the correct concept of justice should be established to improve relevant legislation and mechanism, improve the system of bail and optimize the allocation of judicial resources.

Key words: hidden extended custody, detention period, the period of handling cases, judicial review system

摘要： 隐性超期羁押现象在我国大量存在，主要表现为延期羁押、借期羁押和无期羁押。隐性超期羁押现象产生的原因有很多，主要包括办案人员执法观念存在偏差、有关立法存在缺陷、相关机制不健全、取保候审适用率低、办案资源配置不合理等。解决隐性超期羁押问题，必须树立科学的执法观念，完善有关立法，健全相关机制，完善取保候审制度，优化办案资源配置。

关键词: 隐性超期羁押, 羁押期限, 办案期限, 司法审查制度