The invention belongs to the technical field of tarpaulin production devices, in particular to a large tarpaulin folding device. Aiming at the problems that an existing tarpaulin folding device is poor in tarpaulin folding quality, the present invention provides the following schemes that the large tarpaulin folding device comprises a base, a folding table sliding groove is formed on the inner wall of the base, and a folding table is slidably connected in the folding table sliding groove; the side plates are welded to the two sides of the outer wall of the top of the base, the cloth feeding mechanisms are arranged at the tops of the outer walls at the opposite sides of the two side plates, the driving motors are fixed to the bottoms of the outer walls at one sides of the side plates through screws, and the output shafts of the driving motors are connected with the rotating discs through a piece. In the present invention, during the tarpaulin folding process, the tarpaulin is not subjected to external resistance, the possibility that the tarpaulin wrinkles is reduced, and it is guaranteed that the moving speed of the tarpaulin is uniform during the tarpaulin feeding process, so thatthe folding quality of the tarpaulin is improved accordingly; the folded tarpaulin can be extruded in a staggered manner, folds are formed at the bent positions of the tarpaulin, and the tarpaulin folding flatness is improved.