Web tension controller. Tension gauge to provide a gentle braking force, to avoid strong momentum, the structure is simple, and always maintaining an appropriate tension member winding apparatus proposed utility model, which includes the lower end of the extended arm with a guide hole of the fixed housing, pressure line agencies and tension adjustment mechanism; pressure line agencies, including clamp structure, with structural adjustment plate collars, fixed guide wheel and events guide structure; activities guide structure includes rails, cam, fixed ring, lever, limit bit rod and pole; tension adjusting mechanism includes a screw, guide rods, active block, block rotating relative activity of L-block, with the brake pads brake pads, L-block top against the upper part and structural adjustment; top Ministry crossbar arrived guide structure and activities of the Department in the same horizontal line, and close to the axis of rotation of the cam; adjust the structure includes an outer tube, an outer tube from the bottom end of the L-shaped block piercing offset putter, set in the outer tube and putting offset compression spring and is arranged on the outer cylinder rotation adjustment cap