The invention provides a seedling-cultivation flexible seeding apparatus, relating to the field of agricultural machinery technology; the seedling-cultivation flexible seeding apparatus comprises a seedling storage plate and a seedling dropping plate, the seedling storage plate is arranged on the seedling dropping plate and can move relative to the seedling dropping plate, the seedling storage plate and the seedling dropping plate are provided with a seedling filling hole and a seedling dropping hole correspondingly, under a seedling filling state, the seedling filling hole and the seedling dropping hole are staggered, and under a sowing state, the seedling filling hole and the seedling dropping hole are run-through; the seedling-cultivation flexible seeding apparatus is characterized in that: two seedling filling hairbrushes are arranged on a parallel bracket above the seedling storage plate, two seedling filling hairbrushes rotate inwards by respectively revolving the seedling filling hairbrush shafts and are respectively tangent with the seedling storage plate, and a seedling containing space is left between the two seedling filling hairbrushes; the seedling storage plate and the seedling dropping plate are arranged on a transmission mechanism and do reciprocating motion vertical to the direction of the seedling filling hairbrush shafts, and a spring resetting device is arranged between the seedling storage plate and the seedling dropping plate. The seedling-cultivation flexible seeding apparatus is suitable for characteristics of different crop seedlings, meets the seedling-cultivation agricultural requirements, increases the using efficiency of an automatic system in the existing assembly line and has the advantages of flexible seedling filling and no damage to the seedlings.