The invention discloses a keel frame connector with high flexibility, which comprises an upper clamping plate, an upper piercing groove, a lower piercing groove, a lower clamping plate, a knob, a main keel, an auxiliary keel, sliding balls, a top nut, a bottom bolt, Inner groove, block, retractable spring, connecting plate, traction spring, sliding rod, chute and slot. The beneficial effects of the present invention are: the connector is formed by clamping the upper and lower clamping plates, and the upper and lower ends of the upper clamping plate are respectively provided with upper and lower penetration grooves, and the connector is clamped by using the upper and lower two penetration grooves. Connected to the keel frame, so that the connecting piece and the keel armor are more stably snapped together. By installing sliding balls inside the upper and lower passing grooves, installing top nuts on both sides of the sliding balls, and installing bottom bolts at the bottom of the sliding balls, the top nuts and bottom bolts can control the sliding balls to clamp the dragon frame when tightened, and when released When making the sliding ball slide on the keel frame, it is convenient to adjust the installation position of the connecting piece on the keel frame.