A pluggable module, comprising a power control unit, an interface unit, a monitoring unit, and a signal linkage unit, wherein the power control unit is connected to the interface unit, and the pluggable module is inserted into an external device by using the interface unit; the signal linkage unit comprises a bracket, a pull ring of an open annular structure, and a signal switch, wherein one end of the pull ring is rotatably connected to the bracket, the other end is configured to trigger the signal switch, and when the pull ring is in an ON state, the signal switch is triggered to send a first switch signal, or when the pull ring is in an OFF state, the signal switch sends a second switch signal; and the monitoring unit is connected to the power control unit and the signal linkage unit, and is configured to control, upon receiving the first switch signal, the power control unit to be powered on, or control, upon receiving the second switch signal, the power control unit to be powered off, wherein the pluggable module further comprises a pin, and a slot is further disposed on the pull ring; and when the pull ring is in the ON state, the pin can be inserted into the slot, the pluggable module is locked, and cannot be removed, and when the pull ring is in the OFF state, the pluggable module is unlocked, and the pluggable module can be removed by pulling the pull ring, wherein the signal linkage unit further comprises a damping mechanism, a first gear structure and a second gear structure that can be engaged with the damping mechanism are disposed on the pull ring, and the first gear structure and the second gear structure are sequentially disposed along a direction away from a support base; and when the second gear structure is engaged with the damping mechanism, the pull ring is in the ON state, and the pull ring triggers the signal switch to send the first switch signal; or when the second gear structure is disengaged from the damping mechanism, the signal switch sends the second switch signal. the power control unit is connected to the interface unit, and the pluggable module is inserted into an external device by using the interface unit; the signal linkage unit comprises a bracket, a pull ring of an open annular structure, and a signal switch, wherein one end of the pull ring is rotatably connected to the bracket, the other end is configured to trigger the signal switch, and when the pull ring is in an ON state, the signal switch is triggered to send a first switch signal, or when the pull ring is in an OFF state, the signal switch sends a second switch signal; and the monitoring unit is connected to the power control unit and the signal linkage unit, and is configured to control, upon receiving the first switch signal, the power control unit to be powered on, or control, upon receiving the second switch signal, the power control unit to be powered off, wherein the pluggable module further comprises a pin, and a slot is further disposed on the pull ring; and when the pull ring is in the ON state, the pin can be inserted into the slot, the pluggable module is locked, and cannot be removed, and when the pull ring is in the OFF state, the pluggable module is unlocked, and the pluggable module can be removed by pulling the pull ring, wherein the signal linkage unit further comprises a damping mechanism, a first gear structure and a second gear structure that can be engaged with the damping mechanism are disposed on the pull ring, and the first gear structure and the second gear structure are sequentially disposed along a direction away from a support base; and when the second gear structure is engaged with the damping mechanism, the pull ring is in the ON state, and the pull ring triggers the signal switch to send the first switch signal; or when the second gear structure is disengaged from the damping mechanism, the signal switch sends the second switch signal.