A baby crib capable of being unfolded and folded synchronously comprises two crib side frames, a bottom frame structure and two surrounding rod assemblies, the two surrounding rod assemblies are hinged between the tops of the two crib side frames, the bottom frame structure comprises an unlocking base plate and two bottom frames, the unlocking base plate is located between the two bottom frames, and the unlocking base plate is located between the two bottom frames. Each bottom frame corresponds to one
bed side frame, one end of each bottom frame is rotatably connected with the corresponding
bed side frame, the other end of each bottom frame is provided with two gears, every two adjacent gears on the two bottom frames are meshed with each other, the gears are rotatably connected with an unlocking base plate, and elastic plug pins are arranged in the front end and the rear end of the unlocking base plate. The gear is provided with a plug pin hole, a pulling piece is arranged in the middle of the unlocking
chassis, the top of the pulling piece extends out of the top face of the unlocking
chassis, and the middle of the two surrounding rod assemblies can be automatically folded downwards along with external expansion of the upper portions of the two
bed side frames. The folding chair is easy to fold and unfold.