Abstract: The principle of the X-ray micro-Power diffraction method is that the X-ray is irradiated on the smooth surface of the sample to cause diffraction, and it has no obvious relation to the thickness of the sample. So the conventional sample framework can be replaced by a smooth shallow small trough. A small trough of 13mm 15mm 0.1mm and a sample amount of 30 milligrams are used in our experiments. 2. The carrier is made with a domestic light shale with strong absorption of fluid. Then it is coated with the clay sample immersed in ethylene glycol. The remaining ethylene glycol which has not got into the expansible layers can be absorbed by the carrier. Therefore, an oriented clay film for the analysis of Xray diffraction rapidly forms on the carrier. The advantages of this method are: the method of immersion is simple and can make the expansible layers be saturated to the last degree.Because of its strong absorption of fluid, an oriented clay film can form rapidly. It is obvious that it is a fast and reliable method, and treatment of the ethylene glyeol is greatly simp1ified.