The invention provides a rapid full-section supporting apparatus suitable for crushing wall rock. The rapid full-section supporting apparatus comprises a main pillar, a left lateral pillar, a right lateral pillar, a base plate jack, a main supporting plate, a left lateral supporting plate and a right lateral supporting plate; the main supporting plate is fixedly mounted at the top end of the main pillar; the left lateral supporting plate is fixedly mounted at the top end of the left lateral pillar, while the right lateral supporting plate is fixedly mounted at the top end of the right lateral pillar; the main pillar is located at the top end of the base plate jack; the left lateral pillar and the right lateral pillar are mounted on the left and right sides of the main pillar, respectively. The rapid full-section supporting apparatus is capable of realizing rapid full-section supporting for the wall rock of a roadway, and also capable of solving the technical problems of heavy deformation of the wall rock of the roadway in the exploitation process of deep underground engineering resources, and wall rock crushing easily causing inbreak to hurt people especially in the vicinity of such geologic structures as faults and folds.