The utility model provides a soluble ball seat of bowling sliding sleeve belongs to petroleum industry downhole tool field. The ball seat is type ladder shaft structure, including big footpath section and the path section that connects gradually, the diameter of big footpath section is greater than the diameter of path section, the terminal surface of big footpath section is equipped with the shearing ring, the external diameter of shearing ring department is greater than the external diameter of big footpath section, the ball seat adopts the soluble metal material to make, all is equipped with resistant erosion coating on the whole inside and outside surface of ball seat. The utility model discloses both possessed very high intensity, can satisfy the high pressure -bearing demand of ball seat, again can be in the pit fluid environment automatic dissolving down, the fracturing operations back that finishes, the ball seat dissolves the full latus rectum that can realize in the pit shaft, does benefit to to go into operation pipe string under the later stage and carry out the secondary transformation to the payzone.