Manufacturing method for wedge-shaped acoustic matching layer

The invention discloses a manufacturing method for a wedge-shaped acoustic matching layer. The manufacturing method includes the concrete steps that quartz microneedles of a wedge structure are taken as a template and filled with a liquid state material A, and it is ensured that the gaps of the wedge template are completely filled with the solidified material A; a quartz wedge array filled with the material A is placed in a hydrofluoric acid solution, and quartz is corroded off to form the wedge template made of the material A; the wedge template made of the material A is filled with a material B solution which is designed and prepared according to acoustic impedance requirements, and the solution is completely solidified; two wedge structure interfaces made of different materials are extracted through cutting and grinding to manufacture thin sheets with a certain thickness. The thin sheets have the advantage that equivalent acoustic impedance changes continuously in the thickness direction, and therefore the