As a traditional profiled metal sheet roof, its backward fixing method determines its lack of wind resistance. For example, for the roof panel fixed by screw penetration, the contact area between screw cap and roof panel is very small. When encountering strong wind, due to repeated bearing of positive and negative wind pressure, the roof panel produces stress concentration at the nail hole, resulting in tearing. Although the screws remained on the purlin, the roof panel had been blown away. The roof system adopted by TENGWEI color steel yx65-420 aluminum magnesium manganese alloy profiled plate is fundamentally different from the traditional plate construction in terms of fixing method. It adopts high-strength aluminum alloy fixing seat and purlin, then clamps the roof panel on the plum blossom head of the fixing seat, and then locks the plate rib on the fixing seat with an electric edge locking machine. This fixing method does not need to penetrate the plate surface, Therefore, there is no damage to the roof slab, of course, there will be no problem of stress concentration. The wind resistance test of this system has been carried out in the domestic authoritative testing organization. In the repeated load test of 7.0kpa, the test pieces (including roof panel, fixing seat and screw) are not damaged, which proves the superiority of the wind resistance performance of this roof system. Yx65-420 aluminum alloy hammered straight plate roof panel has vertical plate ribs, so that its drainage section is hardly affected by the plate ribs. The effective drainage section is larger than that of ordinary plate type, and the plate rib of this plate type is up to 65mm, which can ensure the waterproof performance of the roof panel under the condition of transverse inclination (double curvature roof), and has stronger adaptability to the super long roof with gentle slope.