A soft-back microneedle and a manufacturing method therefor； the soft-back microneedle comprises a substrate (1) and a needle (2) fixed to a bottom portion of the substrate (1)； the substrate (1) and the needle (2) are integrally cast and formed together, the substrate (1) and the needle (2) are made of a thermoplastic material, the substrate (1) is a soft flexible board that may be bent, and the needle (2) is a structure which is large at the top and small at the bottom. The soft-back microneedle is made of a thermoplastic material, the thermoplastic material being safe and not causing skin irritation； after being inserted into the skin and contacting body fluids, the feel under the skin is better, and the microneedle is water insoluble or has low water solubility, or may maintain sufficient adhesiveness after contact with water； moreover, the microneedle may be easily pulled out after administration, rather than dissolving in the skin. The thermoplastic material is made into a deformable flexible material, the substrate (1) made therefrom is a soft flexible board that may be bent and is further stuck on an auxiliary layer (3) that is similarly soft. The described microneedle may meet usage requirements of many large-area and large-curvature body parts.L'invention concerne une micro-aiguille à dos souple et son procédé de fabrication. La micro-aiguille à dos souple comprend un substrat (1) et une aiguille (2) fixée à une partie inférieure du substrat (1). Le substrat (1) et l'aiguille (2) sont moulés d'un seul tenant et ne forment qu'un. Le substrat (1) et l'aiguille (2) sont constitués d'un matériau thermoplastique. Le substrat (1) est formé d'une plaque lisse et souple qui peut être pliée et l'aiguille (2) est une structure dont la partie supérieure est grande et la partie inférieure petite. La micro-aiguille à dos souple est constituée d'un matériau thermoplastique sans danger et ne provoquant pas d'irritation cutanée. Après son introduction dans la peau et une
