The invention discloses a high-softness baby pull-up diaper, which comprises a surface course structure, an absorbent core structure, a bottom course structure, a closing structure and an adhesive structure, wherein the surface course structure comprises a surface course non-woven fabric; the absorbent core structure comprises a composite core, a core-spun non-woven fabric and a stream guidance course; the bottom course structure comprises a bottom course non-woven fabric and a water-insulation film which is bonded to the inner side of the bottom course non-woven fabric; the absorbent core structure is fixed to the bottom course structure; the surface course non-woven fabric covers the absorbent core structure; the stream guidance layer is arranged between the surface course non-woven fabric and the core-spun non-woven fabric; two sides of the surface course non-woven fabric are fixedly arranged on the bottom course structure; a plurality of bottom film composite structural adhesive strips are arranged between the bottom course non-woven fabric and the water-insulation film; a gap is kept between every two bottom film composite structural adhesive strips; and the gaps are located between the absorbent core structure and the water-insulation film. With the implementation of the pull-up diaper disclosed by the invention, the application of the bottom film composite structural adhesives can be greatly reduced, so that manufacturing cost is reduced; and meanwhile, the softness of the absorbent core structure is improved, so that wearing comfort in a baby is enhanced.