The invention discloses a preparing technology for a ceramic-fiber composite silicon-dioxide aerogel insulation quilt. Silicon-dioxide aerogel liquid is mainly subjected to saturation absorption witha ceramic fiber blanket, geling is carried out in specified conditions, supercutical fluid CO2 is dried, and an enhanced aerogel material is formed. The ceramic-fiber composite silicon-dioxide aerogelinsulation quilt prepared with the technology has the excellent insulation performance, mechanical performance and fireproof and waterproof performance, and construction is convenient; in the preparing method, the solvent replacement step is omitted, operation is easy, the process is controllable, and continuous production can be achieved.