The invention discloses a three-dimensional flower-like 
salicylic acid radical intercalation layered 
hydroxide nano material and a preparation method thereof. The three-dimensional flower-like 
salicylic acid radical intercalation layered 
hydroxide nano material is nano 
powder with uniform particles, the 
diameter of the three-dimensional flower-like 
salicylic acid radical intercalation layered 
hydroxide nano material is 1-2mum, a 
microstructure of the three-dimensional flower-like salicylic 
acid radical intercalation layered hydroxide nano material is a flower-like structure, petals are nano slices grown uniformly, and thickness of each nano slice is 5-20nm. The preparation method of the three-dimensional flower-like salicylic 
acid radical intercalation layered hydroxide nano material comprises the following steps of: mixing 
mixed solution of soluble 
divalent metal and soluble 
aluminium salt with salicylate solution, and regulating pH value to be 6.5-7.5 with an alkaline solution; carrying out hydrothermal 
crystallization for 12-72 hours at the temperature of 120-160 DEG C under standing condition; and washing and 
drying, so that the three-dimensional flower-like salicylic 
acid radical intercalation layered hydroxide nano material is obtained. A hydrothermal method is adopted for preparation, the obtained material has uniform nano particles, and the petals are slices grown uniformly. The preparation method disclosed by the invention has the characteristics of available raw materials, simple equipment and process, no guiding agent or modifier, high efficiency, high speed and high yield and is applicable to large-scale industrial production.