An electric lock body is provided. The electric lock body includes a housing, a driving mechanism, and a bolt. The driving mechanism includes a motor, a planetary gear assembly, and a cage. The planetary gear assembly includes a ring gear, a planet gear, and a sun gear. The motor is rotatably connected to the sun gear. The planet gear is rotatably connected between the sun gear and the ring gear. The cage is disposed at one side of the planetary gear assembly. The ring gear and the sun gear each abut against the cage. The planet gear is connected to the cage. The bolt is connected to the cage. When the cage rotates, the bolt is driven by the cage to move, to make the bolt switch between an unlocked state where the bolt is accommodated in the housing and a locked state where the bolt extends beyond the housing.