The invention discloses a high-pressure thin water spray fire-fighting injector used in submarine and ship, comprising injector shell, injector patchplug, central air spout, spherical air spout, outer air spout, internal filtering net, metallic sealing bale and dust shield. The shape of injector shell is two conical surfaces, the top of conical surface neat top part is plain, the central part is equipped with air spout; conical surface near to top is distributed with several spherical sir spouts; outer circle of conical surface near to top is next to another conical surface, a plurality of outer air spouts are installed on said conical surface. The air spouts on different installation surface are intercrossed, the injector shell and central air spout, spherical air spout and outer air spout, and injector shell and injector patch plug are all connected with each other through screw. The sealing employs metallic pad. The air spout is connected with the cavity of injector shell; the cavity of injector patch plug is equipped with stainless steel filtering net; another end of injector patch plug is connected with fire-fighting system through screw, and the injector shell is provided with dust cover.