The utility model discloses a scalability safety fence has, including landing leg and rack stake, the whole shape of landing leg is for falling' T' type structure, landing leg pole department is equipped with the mounting groove that is used for installing the rack stake, rack stake one end is connected with the landing leg through activity riveting pin, the landing leg is equipped with two, the rack stake is equipped with a plurality ofly, all be connected through activity riveting pin between rack stake and the rack stake, the whole shape that the rack stake connected into is the scalable form of net, the landing leg upper end is equipped with the safety warning district. It is inconvenient that original safety fence transport has been solved in this practicality, the shortcoming of management difficulty occupations of land side, and simple structure is not only makeed in this design, and the cost of manufacture hangs down, not only can play fine protecting effect on daytime, and the incident because of seeing that unclear safety fence leads to night has been stopped in the protection at assurance that can also be fine night, and each big or small place can be applied to to telescopic design, has a thing multipurpose's beneficial effect.