防护绿地是指为满足城市对卫生、隔离、安全的要求而设置的绿化用地。其功能是对自然灾害和城市公害起到一定的防护或减弱作用，不宜兼作公园绿地使用。
公园绿地和防护绿地都在接近6％的水平。
Park green space and protective greenbelt are close to 6% level.
防护绿地只有25块，但面积却也占到了城区绿地总面积的23.81%。
Although Green buffers had only 25 patches, their area account for 23.81% of the total vegetation area.
双圈护栏网可用于高速公路、机场、市政绿地、园林花坛、单位绿地、港口绿地的装饰防护。
Double Circle Fence can be used for highways, airports, municipal green space, garden flower beds, units green space and port green space of the decorative and protective.
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