Abstract: A protection apparatus applied to a radiotherapy treatment couch and a radiotherapy treatment couch are provided. The protection apparatus includes: a protection panel and a status control mechanism connected to the protection panel, the protection panel being located in a to-be-protected area of the treatment couch and being perpendicular to a couch top of the treatment couch when in a use position, and the status control mechanism being configured to fix the protection panel to the use position or adjust the protection panel to a lay-down position. In the embodiments of the present disclosure, the status control mechanism may adjust the protection panel in the use position, or in the lay-down position, so that the protection panel may protect a patient when in the use position, and the protection panel may not hinder a movement of the patient when in the lay-down position.