A foldable hinge, comprising: a base; and two folding assemblies on both sides of the base and coupled to the base, the two folding assemblies being foldable relative to each other, wherein each folding assembly comprises a rotating arm and a support member, a first end of the rotating arm being rotatably coupled to the base, the support member being rotatably coupled to a second end of the rotating arm away from the base, a side of the support member close to the base being rotatably coupled to the base, and the support member being slidable in a direction towards or away from the base; and wherein, when bringing the two folding assemblies together, a distance between portions of the two support members coupled to the rotating arms is smaller than a distance between portions of the two support members coupled to the base, wherein a surface of the base coupled to the folding assembly comprises a first circular arc groove, the rotating arm comprises a first body portion and a first arc arm, an end of the first arc arm being coupled to the first body portion, and the first arc arm being in the first circular arc groove and being slidable along the first circular arc groove, characterized in that: the surface of the base further comprises a first recess, the first recess is on a side of the first circular arc groove, and a side wall of the first recess has a pin shaft, the support member comprises a connection block, the connection block of the support member is in the first recess, and the pin shaft is in a first guiding sliding slot of the connection block. a base; and two folding assemblies on both sides of the base and coupled to the base, the two folding assemblies being foldable relative to each other, wherein each folding assembly comprises a rotating arm and a support member, a first end of the rotating arm being rotatably coupled to the base, the support member being rotatably coupled to a second end of the rotating arm away from the base, a side of the support member close to the base being rotatably coupled to the base, and the support member being slidable in a direction towards or away from the base; and wherein, when bringing the two folding assemblies together, a distance between portions of the two support members coupled to the rotating arms is smaller than a distance between portions of the two support members coupled to the base, wherein a surface of the base coupled to the folding assembly comprises a first circular arc groove, the rotating arm comprises a first body portion and a first arc arm, an end of the first arc arm being coupled to the first body portion, and the first arc arm being in the first circular arc groove and being slidable along the first circular arc groove, characterized in that: the surface of the base further comprises a first recess, the first recess is on a side of the first circular arc groove, and a side wall of the first recess has a pin shaft, the support member comprises a connection block, the connection block of the support member is in the first recess, and the pin shaft is in a first guiding sliding slot of the connection block. the surface of the base further comprises a first recess, the first recess is on a side of the first circular arc groove, and a side wall of the first recess has a pin shaft, the support member comprises a connection block, the connection block of the support member is in the first recess, and the pin shaft is in a first guiding sliding slot of the connection block.