A foldable frame includes a first connection seat and at least three second connection seats which are arranged at intervals around the first connection seat. The first connection seat and the second connection seats are connected by first connection rods, and the second connection seats are provided with at least one second connection rod. The first connection seat has a first end surface, and the second connection seats each has a second end surface. When the foldable frame is in the extended state and the first end surface faces downward, the second end surface is lower than or is flush with the first end surface, and the free end of the second connection rod is configured to extend upward.