The invention discloses a fishing balance weight device. The fishing balance weight device comprises a containing seat and including a plurality of uniformly distributed lead column cavity bodies, anadjusting cap separately arranged at the top of the containing seat and including a cylindrical adjusting cylinder and a round adjusting cover plate, an operation cap separately arranged at the bottomof the containing seat, a plurality of cylindrical lead columns separately arranged in the lead column cavity bodies, a clamp arranged at the bottom of the containing base, wherein the inner wall ofthe adjusting cover plate is provided with a plurality of radially arranged grinding-cutting strips, the operation cap directly drive the clamp and is located between a locking position and a releaseposition, the clamp clamps a fishing line when the operation cap is located at the locking position and release the fishing line when the operation cap is located at the release position. By means ofrotary grinding and cutting of the adjusting cap, the balance weight adjusting precision is high, additional tools are not needed, and the fishing balance weight device is convenient to operate.