The invention relates to a guarded bed which comprises a supporting base, a supporting plate, a backboard, a guardrail assembly and an alarm assembly. The supporting plate is arranged on the supporting base. The guardrail assembly comprises three guardrails rotatably arranged on edges of the supporting plate, the three guardrails are sequentially clamped and connected, and the three guardrails and the backboard jointly surround the supporting plate. The alarm assembly comprises three touch sensing modules, a master processor and an alarm device, the master processor is electrically connected with the three touch sensing modules and the alarm device, the three touch sensing modules are arranged on the three guardrails respectively in a wrapping mode for sensing touch pressure and sending touch signals to the master processor, and the master processor is used for controlling the alarm device to give out an alarm according to the touch signals. The guarded bed can prevent an infant from falling and being injured.