A method for horizontally winding and horizontally unwinding parallel steel wire strands for transport, storage or installation is provided. The method comprises the operation of winding the stranded wire and the operation of unwinding the stranded wire, and includes the following steps: when performing the winding operation, a guiding frame(1) is mounted on the ground, a rotating platform is connected with a rotating shaft (21), the leading end of the wire stranded is passed through the guiding rollers (17) and then is fixed on an inner module (4), and the platform (2) is rotated around the shaft (21); when performing the unwinding operation, the guiding frame (1) is mounted on the ground and one end of the winded stranded wire is pulled out from the guiding rollers (17). The method enables winding the stranded wire with high quality, high working efficiency and low manufacturing cost.