Covered basket type ureteral calculus blockage extractor

The invention relates to a covered basket type ureteral calculus blockage extractor provided with a catheter and a guide wire. The far end of the guide wire is provided with a basket wire made of shape memory and super elastic material, the far end of the basket wire is gathered to form a basket, and the basket is fixed to a blocking film in a scoop shape in a pre-shaped manner; during usage, the basket wire is in a curved shape, and the blocking film is unfolded through the basket wire; during idle, the basket wire and the blocking film are both accommodated in the catheter. The covered basket type ureteral calculus blockage extractor can be placed in the ureter easily, is prevented from pushing calculus to move reversely towards kidneys and damaging the wall of the ureter and is capable of blocking the ureter completely, the calculus and calculus pieces are prevented from returning to the kidney through injected water effectively, the covered basket type ureteral calculus blockage extractor is not prone to deformation during calculus drawing and extraction, is prevented from friction with the wall of the ureter and is capable of extracting all calculus once, and the purpose of extracting calculus effectively is achieved.