The invention relates to a movable type lowering frame and a lowering method for heavy reinforcement cages. The lowering frame comprises a lowering frame base; a frame body is arranged on the lowering frame base, and a platform is arranged on the outer side of the upper end of the frame body. The lowering method comprises the following specific steps that (1), the lowering frame of the reinforcement cages are arranged in position, a tackle combined steel wire rope is arranged, winches are fixed on the platform in a welded mode, and the first section reinforcement cages are hoisted in position; (2), the first section reinforcement cages are lowered; (3), a limiting clamping plate is arranged on a pile casting port so that the reinforcement cages can be overhung above the steel pile casting; (4), sleeves of the next section reinforcement cages are connected; and (5), the reinforcement cages are synchronously lowered by the two winches. The movable type lowering frame has the advantages that the hoisting capacity is large, operation is simple, safety is high, and the lowering frame can be recycled.