Protection structure capable of preventing error operations of uninterrupted power supply

Disclosed is a protection structure capable of preventing error operations of an uninterrupted power supply. The protection structure is used for an uninterrupted-power-supply element provided with a switching switch. The switching switch is provided with a switching element. The protection structure includes a casing, a sensor and a cover body. The casing is provided with an open slot. The uninterrupted-power-supply element is arranged in the casing. The switching element is arranged in corresponding to the open slot. The sensor is arranged on the casing and located at one side of the open slot and electrically connected with the uninterrupted-power-supply element. The cover body includes a cover plate and a block part connected with the cover plate. The cover plate covers and seals the open slot. When the switching element is switched from a first position to a second position, the switching element pushes away the block part so as to enable the open slot to be exposed. Therefore, an effect of preventing a