The invention discloses a manufacturing method of a lithium ion battery high-compaction density pole plate. The pole plate comprises a metal current collector and a conducting mixed slurry; the conductive mixed slurry is coated on the metal current collector at twice or multiple times, the pole plate is dried and rolled after the first coating, and the plate is dried and then rolled after the second coating, the coating, the drying, and the rolling are orderly performed until the conducting mixed slurry is completely coated. The thickness of the conducting mixed slurry wet coating layer through twice or multiple coating is thinner than that of once coating process, the drying load is educed, the drying time is shortened, the single rolling load is reduced, the roll coating is hard to occurunder high rolling pressure, the coating uniformity and precision are improved, the compaction density of the pole plate is increased, so that the volumetric specific energy is increased, the internal resistance of the pole plate is reduced, the polarization is reduced, the discharge capacity is increased, the battery energy density is increased, the cost is reduced, the flexibility of the pole plate is guaranteed, and the phenomena that the surface is curly uneven and even the plate is broken or crisp are avoided.