Plug-in type cable bridge with dustproof function

The utility model discloses a plug-in type cable bridge with a dustproof function, which comprises a bridge body, and the top of the bridge body is provided with an opening; after an installation worker installs a cable bridge through a hanging bracket, a bevel gear II is rotated by rotating a rotating rod I, the bevel gear II drives a bevel gear I to rotate, the bevel gear I drives a gear II to rotate, and the gear II is meshed with the gear I to drive a metal net pipe I to rotate, so that one side, where dust is deposited, of the metal net pipe I rotates to the lower side; a second rotating rod is rotated to drive a cam to rotate, when the cam touches the bottom of a U-shaped block, the cam presses the U-shaped block downwards, the U-shaped block drives a bearing plate to slide downwards to extrude a spring, and when the cam rotates away from the bottom of the U-shaped block, the spring releases elasticity and pushes the bearing plate to slide upwards, so that a vibration block collides with a first metal n