The Hard X-ray Spectroscopy Beamline (BL11B) is a hard X-ray beamline dedicated to X-ray absorption spectroscopy. BL11B can provide an energy range of 5~30 keV and a focused beam of ~ 250×250 μm2. The main experimental methods include X-ray absorption fine structure (XAFS), quick-scanning XAFS (QXAFS) for time resolved XAFS (ms~s) and combination of XAFS and XRD techniques. The beamline is equipped with highly sensitive 36-element Ge solid state detector (Canberra, for fluorescence XAFS) and one-dimensional MYTHEN 5K detector (for XRD). At present, various in situ experimental devices have been developed, including electrochemical reaction cells (transmission and fluorescence XAFS, XRD), closed-cycle cryostat (~3 K，Montana S50), high temperature and high pressure cells (500℃, 10 bar), gas chromatography-mass spectrometry (GC-MS). Based on the multiple experimental methods, users can carry out frontier scientific research in the fields of physics, energy science, materials science and environmental science, etc.