An assembly for preventing accidental shutdowns includes a trigger, a first button, a resisting portion, a first driving portion, a second driving portion, a sliding block, and a processing unit. The sliding block includes at least one block and at least one groove. When the electronic device is in a shutdown state, the at least one resisting wall is in the at least one groove. When the electronic device is powered on, the processing unit controls the first driving portion to drive the resisting portion to rise up, and controls the second driving portion to drive the sliding block to move horizontally related to the first button until one end of the resisting wall resists against the first button. The other end of the resisting wall resists against the at least one block. An electronic device with the assembly is also provided.