The invention discloses a spiral double-rocker composite hinge groove cam combination space mechanism for a sliding-plug door, and relates to a sliding and plug, sealing, opening and closing mechanism for the sliding-plug door of a vehicle, in particular to a spiral double-rocker composite hinge groove cam combination space mechanism for the sliding-plug door of high-speed rail or other railway vehicles. The mechanism comprises a motor, a coupler, a screw, a bearing shaft, a shaft sleeve, a nut, a short rocker, a door carrying rocker (a rocker for short), a connection rod, a door handle, a roller, a roller shaft, a groove cam, a door leaf and a door frame, wherein a spiral mechanism consists of the screw, the nut and the door frame; a double-rocker mechanism consists of the bearing shaft, the shaft sleeve, the short rocker, the rocker, and the connection rod; a groove cam mechanism consists of the bearing shaft, the rocker, the roller, the roller shaft, the groove cam, the door handle, the door leaf, and the door frame; a rotation pair consists of the upper end of the connection rod and the short rocker; a composite hinge consists of the lower end of the connection rod, the rocker and the door handle; and the spiral mechanism, the double-rocker mechanism and the groove cam mechanism are connected to form the spiral double-rocker composite hinge groove cam combination space mechanism.