The present invention relates to the technical field of unmanned aerial vehicle (UAV) and discloses a vertical tail for a composite-wing UAV, comprising: a body (1), a rudder face section (2), a rotor section (3), a shock absorbing component (4) and a quick installation assembly of circuit (5). The body (1) includes a tail body frame (11) and a shell (12). The rudder face section (2) comprises a rudder machine (21) and a rudder surface (22). The rudder surface (22) is connected to one end of the tail for steering the directional deflection of the UAV. The rudder machine (21) is used to drive the rudder surface (22). The shock absorbing component (4) is connected to the lower end plate (111) and the shock absorbing component (4) absorbs the shock to the body (1). The quick installation assembly of circuit (5) includes a plug (51), a positioning sleeve (52) and a bias piece (513), the positioning sleeve (52) is located on the outer circumference of the plug (51) and slidingly connected to the plug (51), the bias piece (513) is set between the plug (51) and the positioning sleeve (52), the bias piece (513) can absorb the impact on the plug (51). When the composite-wing UAV lands, the shock absorbing component (4) can absorb the energy generated by the rigid impact of the composite-wing UAV with the ground, and the quick installation assembly of circuit (5) can ensure the reliable connection of the electrical system of the composite-wing UAV, thus protecting the body of the composite-wing UAV and the internal electronic devices.