A precisely spliced foldable LED screen, comprising: a screen, formed by at least one group of subscreens arranged vertically; a steel cable, arranged at a back of the subscreens, characterized in that the steel cable comprises: a long steel wire and a short steel wire which are vertically connected end-to-end and have the same diameter, wherein the ends of the long steel wire and the short steel wire are respectively provided with a square fixture block of a concave shape; wherein the end of one of the long and short steel wires is fixed to a part of the fixture block at one side of the fixture block; wherein the opposite part of the fixture block is provided with a through groove such that the other one of the long and short steel wires can be matched and clamped into said groove; and wherein adjacent ends of the long and short steel wires are mutually and alternatively spliced together through the fixture block; and wherein the foldable LED screen also comprises fixing seats, wherein the fixing seat comprises: a base, wherein a square concave hole is arranged on the base, one corner of the concave hole is provided with a convex block having an installing hole, the centre at a bottom of the concave hole is provided with an elongate slot, a sliding block is arranged in the elongate slot, and the base is provided with a sliding slot at the two sides of one end of the concave hole; a cover plate which may slide along the sliding slot to cover or open the square concave hole; a spring arranged in the square concave hole of the base, wherein one end of the spring is inserted into the installing hole of the convex block, and the other side is connected with the cover plate through a screw and the sliding block; a fixing slot arranged at one side of the base and vertical to the sliding direction of the cover plate, wherein two slot openings matched with the long and short steel wires are respectively extended out from the two ends of the hole of the fixing slot; and a fixing lug stretching out from the two ends of the base and provided with a screw hole; the fixing seat is arranged in upper and lower ends of the back of the subscreen such that the fixing slot of the fixing seat is vertically arranged; the spacing between the upper and lower fixing seats is matched with the length of the long steel wire; the spacing between two vertically adjacent fixing seats on the two subscreens are matched with the length of the short steel wire; the fixture block at the connected part of the long and short steel wires is clamped into the fixing slot and the steel wires stretch out from the slot opening. a screen, formed by at least one group of subscreens arranged vertically; a steel cable, arranged at a back of the subscreens, characterized in that the steel cable comprises: a long steel wire and a short steel wire which are vertically connected end-to-end and have the same diameter, wherein the ends of the long steel wire and the short steel wire are respectively provided with a square fixture block of a concave shape; wherein the end of one of the long and short steel wires is fixed to a part of the fixture block at one side of the fixture block; wherein the opposite part of the fixture block is provided with a through groove such that the other one of the long and short steel wires can be matched and clamped into said groove; and wherein adjacent ends of the long and short steel wires are mutually and alternatively spliced together through the fixture block; and wherein the foldable LED screen also comprises fixing seats, wherein the fixing seat comprises: a base, wherein a square concave hole is arranged on the base, one corner of the concave hole is provided with a convex block having an installing hole, the centre at a bottom of the concave hole is provided with an elongate slot, a sliding block is arranged in the elongate slot, and the base is provided with a sliding slot at the two sides of one end of the concave hole; a cover plate which may slide along the sliding slot to cover or open the square concave hole; a spring arranged in the square concave hole of the base, wherein one end of the spring is inserted into the installing hole of the convex block, and the other side is connected with the cover plate through a screw and the sliding block; a fixing slot arranged at one side of the base and vertical to the sliding direction of the cover plate, wherein two slot openings matched with the long and short steel wires are respectively extended out from the two ends of the hole of the fixing slot; and a fixing lug stretching out from the two ends of the base and provided with a screw hole; the fixing seat is arranged in upper and lower ends of the back of the subscreen such that the fixing slot of the fixing seat is vertically arranged; the spacing between the upper and lower fixing seats is matched with the length of the long steel wire; the spacing between two vertically adjacent fixing seats on the two subscreens are matched with the length of the short steel wire; the fixture block at the connected part of the long and short steel wires is clamped into the fixing slot and the steel wires stretch out from the slot opening.