The invention provides a carbon fiber reinforced composite material and a preparation technology thereof. Carbon fiber braided fabric is pretreated in a composite pretreatment solution with the concentration of 50 to 60 percent, wherein the composite pretreatment solution comprises 5 to 20 percent of oxydol and one or more of the following components: 50 to 70 percent of nitric acid, 30 to 50 percent sodium nitrate, ferric chloride, potassium permanganate, and acidic potassium dichromate; the carbon fiber braided fabric is pre-tightened in a adjustable and controllable stretching mechanism byadopting a compression moulding forming method, and then is fixed on a mould through a positioning device and coated with thermosetting resin powder with a required thickness; according to the performance indexes of the carbon fiber reinforced composite material to be manufactured, the carbon fiber braided fabric and the thermosetting resin powder with the required thickness are laid in a matrix position in the mould lay by lay until to designed layer number and thickness are achieved; and then heating and compression molding are carried. Through the surface treatment to the carbon fiber withthe specially prepared composite solution, the compatibility of carbon fiber and thermoset material is greatly improved, and the adhesion property of the carbon fiber and matrix resin is improved. Through the adoption of compression moulding forming, the forming technology is simple, the production is flexible, the production cycle is short, the equipment investment is small, and the cost is low.