The invention provides a hollow glass with a controllable dimming structure; the hollow glass comprises a transverse sash, a vertical sash, and a hollow glass sheet; the hollow glass sheet forms a hollow cavity; the controllable dimming structure is arranged in the hollow cavity, and comprises a traction shaft and a plurality of dimming plates; two turning traction wires wind the traction shaft and fix the dimming plates; the end portion of the turning traction wire is connected with a permanent magnet A, and the other end is connected with a balance block having equal weight with the permanent magnet A; a permanent magnet B attaching with the permanent magnet A is arranged outside the hollow glass sheet; the dimming plate comprises a mirror reflection surface and a diffuse reflection surface; the mirror reflection surface is a smooth surface; the diffuse reflection surface is a rugged surface; the mirror reflection surface faces to the outdoor direction; the diffuse reflection surface faces to the indoor direction; the traction shaft is fixedly connected with the vertical sash. The hollow glass can reflect the parallel light directly entering the room into non-parallel light, so the glaring light can become soft, and the dimming structure is adjustable in angle, thus saving energy.