We　propose　and　experimentally　demonstrate　a　compact　crossing　based　on　a　sub-　wavelength　grating　slot　waveguide　(SWG-SW),　leveraging　the　anisotropic　properties　of　two　orthogonal　SWG-SWs　to　suppress　diffraction　effects　in　the　crossing　region　for　the　input　TE　polarization　mode.　The　design　utilizes　the　unique　mode　characteristics　of　the　SWG-SW,　enabling　low-loss　mode　transitions　through　the　crossing　with　a　simple　and　compact　hollow　structure　design　at　its　center.　By　integrating　the　above　crossing　with　a　well-designed　slot-to-SWG-SW　mode　converter,　a　crossing　for　the　widely　used　slot　waveguides　is　achieved,　with　a　footprint　of　similar　to　18x18　mu　m2.　Simulation　results　show　that　the　device　achieves　an　insertion　loss　(IL)　of　＜0.35　dB　and　a　crosstalk　(CT)　of　＜-40　dB　over　a　bandwidth　range　of　1500-1600　nm.　Experimental　results　confirm　that　within　the　wavelength　range　of　1500-1580　nm,　the　IL　is　approximately　0.4　dB,　and　CT　values　are　below-28　dB.　To　further　improve　the　device　performance,　additional　side　grating　arrays　are　incorporated　into　the　design.　The　optimized　structure　with　side　gratings　achieves　IL　of　＜0.13　dB　and　CT　values　around-35　dB.　Experimental　measurements　of　the　device　with　side　gratings　demonstrate　a　stable　IL　of　approximately　0.1　dB　and　CT　values　consistently　below-35　dB,　marking　a　significant　improvement　over　the　original　design.　To　the　best　of　our　knowledge,　this　is　the　first　experimentally　verified　crossing　for　slot　waveguides.　Further　analysis　indicates　that　the　device　exhibits　an　exceptionally　broad　bandwidth　of　approximately　576　nm　(1257　nm　to　1833nm)　with　IL　＜　1　dB　and　CT　＜　-30　dB.　(c)　2025　Optica　Publishing　Group　under　the　terms　of　the　Optica　Open　Access　Publishing　Agreement