The invention discloses an assembling folding type geocell. Installation units are transversely and longitudinally distributed at equal intervals. The four sides of each installation unit are hinged to connecting boards. Unit boards are connected between the connecting boards corresponding to the transverse and longitudinal adjacent installation units. The unit boards are arranged criss-cross andassembled to the installation units to form the geocell. Production and installation are convenient, the overall strength is high, meanwhile, the length and the width of the whole geocell can be expanded through increase of the installation units and the unit boards at will, and expansibility is high; locating piles are arranged below the installation units, the geocell is limited to the ground through the locating piles in a force moment equal-intensity mode, due to the fact that the locating piles are buried underground, the geocell is fixed to a deeper layer, and the tensile strength of thegeocell is improved; and the connecting boards are hinged to the inner portions of annular grooves, the connecting boards can be stored in the annular grooves in the storage process, a storage spaceis saved, storage is convenient, the rotation angles of the connecting boards can be adjusted according to the requirements in the installation process, and a geocell folding function is achieved.