Prefabricating method of high large-bin-lattice caisson

The invention discloses a prefabrication method of a high large-bin-lattice caisson, and belongs to the technical field of caissons, and the prefabrication method comprises the following specific steps: S1, building a bottom die frame, building the bottom die frame through steel bars, installing a die core of a forming bottom die in the built bottom die frame, and installing an outer die of the forming bottom die outside the built bottom die frame; s2, bottom die frame pouring is conducted, concrete pouring is conducted between the die core of the forming bottom die and the outer die, and after concrete pouring forming reaches the needed strength, the die core of the forming bottom die and the outer die are sequentially hoisted and detached; s3, a standard layer frame is erected, and the standard layer frame is erected in the other area through steel bars; s4, transferring and splicing the standard layer frame; s5, standard layer frame pouring; and S6, caisson forming is conducted, the steps S3-S5 are repeate