a foldable base, comprising a bearing seat and a plurality of bearing arms rotatably arranged on the bearing seat;

a stand assembly, disposed on the bearing seat, wherein the bearing arms are able to be folded relative to the bearing seat in a direction approaching the stand assembly;

a beam assembly, disposed on a top of the stand assembly and comprising two foldable beams; and

a locking assembly, configured to limit folding angle of a first bearing arm of the bearing arms and is provided at a joint between the first bearing arm and the bearing seat, the locking assembly comprises a first locking hole and a second locking hole that are disposed on the bearing seat, and a locking member disposed on the first bearing arm, the first bearing arm extends in a horizontal direction when the locking member is in the first locking hole, and the first bearing arm extends in a vertical direction when the locking member is in the second locking hole,

wherein the bearing seat comprises a bearing plate and baffles surrounding the bearing plate, and the baffles are provided with three and are distributed in a triangle shape, with a gap between same ends of each two adjacent baffles, and one end of the first bearing arm is rotatably disposed in the gap by a first rotating shaft, the first locking hole is a first groove formed on the baffles, and the second locking hole is a second groove formed on the baffles, and an opening of the first groove faces towards a horizontal direction, an opening of the second groove faces towards a vertical direction, and the locking member is a locking rod slidably disposed on the first bearing arm and respectively engaged with the first groove and the second groove, and the locking member is elastically connected with the first rotating shaft.