The utility model relates to a disposable micro-traumatological resected tissue extractor. A groove which can break an endotheca is arranged on an endotheca handle close to the endotheca of the utility model, therefore in clinical use, the endotheca can be broken off in the place of the groove to be separate from the endotheca handle, an exotheca and an exotheca handle can be drawn out along the endotheca, and a puncture outfit can also be drawn out along the endotheca simultaneously to bring convenience to operation. Of parts of the utility model, only a shape memory metal opening and collecting line is made of nickel-titanium shape memory alloy wire, others are made of medical polymer materials, so the cost is reduced. Simultaneously, the broken endotheca is destroyed automatically and can not be used again so as to effectively prevent cross infection.