Ignoring the concave-convex joint constraint in the transfer of the adjacent structural sections of the high-piled wharf’s lateral force can lead to a large bent distribution coefficient. We simplify the wharf structure as a rigid continuous beam with elastic support horizontally，consider the rotational stiffness，and derive the calculation formula for the distribution coefficient of the lateral force component of the high-piled wharf bent under the constraint of the concave-convex joint and without considering the constraint. Combining with the engineering example，we compare the results of the normative value，and the formula calculation value without considering the concave-convex joint constraint，and the formula calculation value and the three-dimensional finite element method calculation value considering the concave-convex joint constraint. The results show that the results of the formula calculation are in good agreement with the results of the finite element calculation without considering the concave-convex joint constraint，and the results of the formula calculation and the finite element calculation are smaller than the standard value. Considering the concave-convex joint restraint，the lateral force distribution coefficient of the bent frame reduces as a whole，especially in the middle part of the overall wharf structure（near the concave-convex joint）is quite different from the standard value.