NOVELTY - A solar battery back board structure comprises resin alloy layer (40) as middle layer, and adhesive layer (30), silicon oxide layer (20) and fluorin plastic layer (10) as outward layers.    USE - As solar battery back board structure (claimed) which is used in military, aerospace, communication, agriculture and public facilities.    ADVANTAGE - The solar battery back board structure has alkali resistance, weather resistance, and high mechanical strength.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparing the solar battery back board structure involving taking fluorin plastic layer into the acetone, alcohol and de-ionized water, ultrasonic cleaning for 10 minutes, taking out and using the blower to dry, putting into a vacuum chamber; introducing argon (Ar) plasma, using Ar plasma bombardment fluorine plastic surface, removing impurities, dust, oil stains and oxide on surface of the fluorin resin layer; continuously vacuumizing, when the vacuum indoor pressure reaches 0.1 Pa are respectively introduced SiH4, O2 and Ar; starting the microwave generating device, depositing silicon oxide coating on the fluorin plastic layer to form composite fluorin plastic film; using the laminating method to composite fluorin plastic film with one surface attached polyethylene glycol terephthalate thin film of hot, using laminating method to composite fluorin plastic film to the other surface of the polyethylene glycol terephthalate thin film of hot, where the composite fluorin plastic film and polyethylene terephthalate film with adhesive to obtain the semi-finished product of solar battery back board of symmetrical structure; drying the semi-finished product into the curing house, curing at 50-60 degrees C for 72-120 hours to obtain the solar battery back board finished product.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic view of the solar battery back board structure.    Fluorin plastic layer (10)    Silicon oxide layer (20)    Adhesive layer (30)    Resin alloy layer (40)