The telescopic barrier door of the utility model is more practical, considering various factors such as product processing, installation and use, so as to realize that the length of the door body can be adjusted, facilitate production and installation, facilitate staff access, and can also be used normally and close cattle under the condition of different door sizes.

The black pipe of the barrier door is welded, and then the whole body is hot-dip galvanized. It is anti-corrosion and rust resistant, and can be used for more than 10 years.