NOVELTY - Composite material comprises 50-66 pts. wt. epoxy resin E-44, 1-2 pts. wt. bentonite, 2-3 pts. wt. glass fiber, 20-25 pts. wt. emulsifier, 15-20 pts. wt. dimethylbenzene, 7-12 pts. wt. phenyl glycidyl ether, 4-7 pts. wt. aliphatic dicarboxylic acid, 12-14 pts. wt. isophthalic acid, 8-10 pts. wt. tea polyphenol, 1.2-3.2 pts. wt. silane coupling agent YDH-151, 1.1-3.1 pts. wt. dibutyltin laurate, 11-13 pts. wt. butyl acetate, 6-8 pts. wt. triethanolamine, and 3-6 pts. wt. auxiliary agent.    USE - Composite material used for wind blade.    ADVANTAGE - The composite material has high toughness and is waterproof, resistant to high temperature and corrosion.    DETAILED DESCRIPTION - Composite material comprises 50-66 pts. wt. epoxy resin E-44, 1-2 pts. wt. bentonite, 2-3 pts. wt. glass fiber, 20-25 pts. wt. emulsifier, 15-20 pts. wt. dimethylbenzene, 7-12 pts. wt. phenyl glycidyl ether, 4-7 pts. wt. aliphatic dicarboxylic acid, 12-14 pts. wt. isophthalic acid, 8-10 pts. wt. tea polyphenol, 1.2-3.2 pts. wt. silane coupling agent YDH-151, 1.1-3.1 pts. wt. dibutyltin laurate, 11-13 pts. wt. butyl acetate, 6-8 pts. wt. triethanolamine, and 3-6 pts. wt. auxiliary agent. Auxiliary agent comprises 2-4 pts. wt. benzophenone, 1-2 pts. wt. zinc sulfate, 1.3-2.5 pts. wt. boric acid, 0.7-1.2 pts. wt. camphor, 1-3 pts. wt. aluminum oxide, 2-3 pts. wt. glass microbead, 10-14 pts. wt. gum arabic, 1.2-3.7 pts. wt. terephathalate, 13-17 pts. wt. polyethylene glycol monomethyl ether, 7-9 pts. wt. normal butanol, 4-6 pts. wt. polyvinyl alcohol, and balanced quantity of water. An INDEPENDENT CLAIM is included for a method for preparing composite material, which involves:    (A) heating bentonite for 1-2 hours and then adding glass fiber and epoxy resin E-44 to obtain mixture;    (B) heating obtained mixture at 570-690 degrees C for 20-40 minutes;    (C) adding dimethylbenzene, phenyl glycidyl ether, aliphatic dicarboxylic acid, isophthalic acid, tea polyphenol and silane coupling agent YDH-151 into mixture and then heating at 75-80 degrees C to obtain another mixture; and    (D) adding remaining materials into obtained mixture and then heated at 85-100 degrees C for 3-4 hours to obtain the product.