The invention provides a multipurpose stone breaker for civil engineering. The multipurpose stone breaker comprises a footstand, support pillars, a powder box, a handle, a discharge door, crushing roller structures, a guide hopper, a broken stone box, a support plate, a primary switch, a secondary switch, a buffer broken stone driver structure, a feed hopper, a sprinkler head structure, a connecting shaft and a connecting plate, wherein the footstand is in threaded connection with the lower ends of the support pillars, and the support pillars are longitudinally welded at the four corners of the bottom of the powder box respectively; the handle is connected with the middle of the lower part of the discharge door through screws, and the discharge door is mounted on the front side of the bottom outlet of the powder box through hinges; the crushing roller structures are transversely mounted in the powder box in pairs; and the lower end of the guide hopper is in threaded connection with theupper part of the powder box. The multipurpose stone breaker can be convenient to replace interior components and can also crush limestone. The multipurpose stone breaker has a water spraying function, can reduce dust pollution, and is convenient to operate.