The invention discloses a soft band compaction apparatus for a 1,000kV electric reactor. The soft band compaction apparatus comprises an upper iron yoke, a base plate positioned between the upper iron yoke and a coil, and a magnetic shielding plate positioned between the upper iron yoke and the base plate; the soft band compaction apparatus is characterized by further comprising compaction apparatuses and soft bands fixed on the two sides of the magnetic shielding plate on the base plate; the compressing apparatuses are two long plates, wherein grooves are formed in the two long plates along the upper surface length direction; the soft bands are positioned in the grooves; and sealing clamps for sealing the ports of the soft bands are mounted at the two ends of the soft bands. According the soft band compaction apparatus, the coil is compressed tightly by filling the soft bands with oil; the coil height of an extra-high voltage electric reactor is effectively ensured; the problem of the cracking of the magnetic shielding caused by that the magnetic shielding is damaged due to positioning nails on the clamp parts is avoided; and the soft band compressing apparatus provides forceful support for ensuring that the electric reactor can pass the finished product test.