The invention discloses a single opened sliding door system. The single opened sliding door system comprises mechanism mounting frames arranged at the two ends and a bearing support and further comprises a driving mechanism, a locking sliding way and a locking mechanism which are fixed to the bearing support. The driving mechanism comprises a lead screw driven by a motor and a transmission assembly, and the lead screw drives the transmission assembly to move in a reciprocating mode in the axial direction of the lead screw. The transmission assembly comprises a transmission frame, a nut assembly arranged on the lead screw in a sleeving mode and a locking roller fixed to the nut assembly. The nut assembly is mounted in the transmission frame, and the transmission frame is connected with a controlled target. The locking mechanism comprises a baffle assembly rotatably connected with the bearing support and a reset torsional spring with one end being fixed and with the other end being fixedly connected with the baffle assembly, wherein the reset torsional spring is used for limiting rotation of the baffle assembly. The side face of the baffle assembly and the side face of the locking sliding way constitute a locking space capable of allowing the locking roller to fall into. According to the single opened sliding door system, the problem of safety risks existing in an existing door system is solved.