Sandwich ecological cotton and manufacturing method thereof

The invention relates to the technical field of medium cotton manufacturing methods, and discloses sandwich ecological cotton and a manufacturing method thereof. The sandwich ecological cotton comprises an upper cotton carding layer and a lower cotton carding layer which are sequentially stacked in the vertical direction and are different in hardness and elasticity, a plurality of pearl ball cotton sub-layers are sandwiched between the upper cotton carding layer and the lower cotton carding layer, and fibers of the pearl ball cotton sub-layers are opened and twisted into balls; and the interior of the pearl ball cotton and the gaps of the sub-layers are mutually connected through low-melting-point fibers. According to the sandwich ecological cotton and the manufacturing method thereof, thepearl ball cotton is added to the middle layer of the sandwich ecological cotton, so that the sandwich ecological cotton has the advantages of being fluffy, soft, warm-keeping and good in resilience,the pearl ball cotton is