The invention provides a detachable buckling energy-consumption type column base for a rigid grille. The column base comprises a steel column, a top plate, a bottom plate, ground anchor bolts, a high-strength bolt, a buckling energy-consumption member and a foundation. The steel column is fixed to the top plate, the bottom plate is connected with the foundation, the buckling energy-consumption member is arranged in the direction parallel to the direction of falling rocks between the bottom plate and the top plate, and the buckling energy-consumption member is connected with the bottom plate and the foundation through the ground anchor bolts and connected with the top plate through the high-strength bolt. According to the column base, the intercepting protection of the falling rocks is completed through the deformation buckling of the buckling energy-consumption member, the buckling energy-consumption member is mainly applied to the rigid grille, excellent energy-consumption capabilityis achieved, the buckling energy-consumption member can be detachably replaced after falling rock interception is completed to improve the recycling performance of the rigid grille, and therefore labor force and financial resource are saved.