The utility model discloses a soft expansion-type surrounding rock roadway support device, which comprises a concrete leveling layer, high-strength prestressed anchor rods, base angle anchor rods, a foam cushion, steel meshes, a steel grille arching, a respray layer and an arc pit, wherein the arc pit is dug out on a roadway floor, and the concrete leveling layer is sprayed on the full section; the arc pit has excavating radius, arc length and arch height, and a full-section surrounding rock is connected with the high-strength prestressed anchor rods and prestressed anchor cables; two slope wall bases are connected with downward inclined slope base anchor rods, and the two ends of the floor at a distance from the side walls are connected with outward inclined base angle anchor rods; the respray layer is sprayed on the full section of the roadway, and a concrete ditch is cast in place at the central axis of the full section of the roadway; and gravel is laid at the two sides of the ditch, and a concrete terrace is poured at the top of the gravel. The utility model has simple structure, easy operation and easy implementation, saves a lot of manpower, material and financial resources, and can be widely applied to practical projects.