Door frame mounting structure

The utility model discloses a door frame installation structure which comprises a door frame, a hollow top wall screw, an installation screw, a gasket, an anti-falling nut and an anti-falling rubber sleeve. The mounting screw penetrates through the gasket; the gasket is positioned between the head of the mounting screw and the hollow top wall screw; one end of the hollow top wall screw protrudes outwards in the radial direction to form a limiting part. An external thread structure is formed at the other end of the hollow top wall screw; the anti-loosening nut is in threaded connection with theexternal thread structure; the anti-falling nut and the limiting part are located on the two sides of the limiting clamping jaw; a step hole is formed in the hollow top wall screw; and the anti-falling rubber sleeve is embedded in the large hole of the step hole, and the mounting screw penetrates through the anti-falling rubber sleeve. The hollow top wall screw has the beneficial effect that thehollow top wall screw is e