Abstract: <SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: "Times New Roman"; mso-bidi-font-size: 12.0pt; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">As a super thermal insulation material,silica-aerogel has extra-high porosity and extra-low thermal conductivity.Types and prepareing methods of nano-sized silica gel-thermal insulation material were emphatically introduced.Most common method was that nanoporous aerogel particles and powders were made firstly,then mixed with reinforcing fiber and binder,the composite was made by post-forming lastly.Problems existing in the prepared composite were analyzed and the latest improvement technologies were briefly introduced.Major study in future was also put forward,i.e.to prepare the silica gel-thermal insulation material with good strength and thermal conductivity under the condition of low density from low-cost raw materials.Finally,the prospect of research on this material was proposed. </SPAN>