HDPE welding geocell is a three-dimensional mesh cell made of reinforced HDPE sheet and welded by ultrasonic waves. It can be widely used in the construction of soft foundations such as railways, highways, deserts, swamps, and tidal flats, slope protection, and construction of retaining walls for landslide treatment. It can also be used for greening projects in cities and communities. Due to the superior cold resistance of HDPE, this product can be widely used in the reinforcement projects especially in colder climate regions.