Vehicle roof crossbar

A vehicle roof crossbar comprising:

• a crossbar main body extending along a horizontal direction, wherein a first sliding groove is formed at a bottom of the crossbar main body, and the first sliding groove extends in a same direction as the crossbar main body and runs through two ends in an extension direction of the crossbar main body;
• and
• a sliding seat comprising:
• a first slider, a seat body, a first screw rod, a first clamping block and a second clamping block, wherein the first slider is arranged on a top of the seat body and is configured to be slidably connected to the crossbar main body, the first screw rod is arranged inside the seat body and extends in the same direction as the crossbar main body, the first screw rod is configured to rotate around its axis relative to the seat body, the first clamping block comprises a connecting block and a clamping block, the connecting block and the second clamping block are sequentially threaded through by the first screw rod, the second clamping block is in threaded connection with the first screw rod, a first connecting portion is arranged at a bottom of the connecting block, a second connecting portion that matches the first connecting portion is arranged on a top of the clamping block, and the connecting block and the clamping block are detachably assembled by the first connecting portion and the second connecting portion;
• wherein a spacing between the first clamping block and the second clamping block is adjustable in response to the first screw rod being rotated.