Abstract: 【Objective】 This project aims to clarify the basis for selecting the heat-retaining quilt material and choosing the heat-retaining quilt of every layer material suitable for the cost performance and safety of the greenhouse.The finding from research has provided a reasonable basis and reference for the design, selection, operation and maintenance of heat-retaining materials for the greenhouse. 【Methods】 The heat-retaining characteristics of the heat-retaining quilt were indicated by heat transfer coefficient, which was measured by using a static hot box test method. Under the status of one-dimensional stable heat transfer, the air temperature differences on both sides of the cover material specimen and the heat flow rate through the part were measured, and then the heat transfer coefficient and heat transfer resistance of the cover material and other parameters related to heat-retaining performance were calculated by the heat flow rate. 【Results】 The more heat-retaining material in front of the greenhouse, the more heat transfer resistance, the smaller the heat transfer coefficient, and the better heat-retaining performance. Generally speaking, the heat transfer resistance was between 0.8 to 2.7 (m²·℃)/W. When selecting heat-retaining quilts, the main considerations were heat transfer resistance. The preferred outer material was waterproof material, the intermediate layer material was insulation cotton insulation quilt. Preferred outer material was non-woven fabric, intermediate layer material was pearl cotton, sandwich cotton insulation quilt. When the outer layer of insulation material was non-woven, the intermediate layer material in the quilt was to choose insulation cotton and wool mesh. 【Conclusion】 The outer layer material is waterproof material, the intermediate material is thermal insulation cotton insulation is suitable for Xinjiang solar greenhouse because of the good cost performance and safety.