The utility model relates to a constant-force grinding polishing tool system which is a grinding polishing tool. The constant-force grinding polishing tool system comprises a power device, a wheel-changing grinding tool, a vibration damping device, a guider, a force compensation and detection device, a counterweight device for grinding with constant force, wherein the grinding tool head ensures that the wheel-changing grinding tool moves along vertical direction through the guider. Vertical floating forms normal polishing force of a blade through the total weight resultant force of an auxiliary low-friction cylinder and a tool system, and an S-type sensor measures the normal force of a tool head, compares the normal value with a set value, and feeds back the final value to a computer. An electric appliance proportion valve is adjusted to control low-friction auxiliary cylinder to compensate force, and the power device isolates the vibration source of a motor over the tool system through the vibration damping device. The high-precision force control is realized through the feedback of the S-type sensor. The constant-force grinding polishing tool system is novel in structure, and realizes the purposes of constant force polishing of blades with different curvature surfaces, ensuring surface consistency, reducing residual stress and improving polishing efficiency.