The invention discloses a novel connecting structure for a head and a
regenerative cooling body of a
rocket engine. The novel connecting structure for the head and the
regenerative cooling body of the
rocket engine comprises the head, the
regenerative cooling body, a connecting ring and a filter screen. An installation groove is formed in the head in the direction of an injection panel and used for positioning a
combustion chamber section of the regenerative cooling body. A first weld joint is arranged on the outer side of the head and used for
welding the big end of the connecting ring through a
high energy beam. A second weld joint is arranged on the outer side of the inner wall of the
combustion chamber section of the regenerative cooling body and used for
welding the head through the
high energy beam. A third weld joint is arranged on the outer side of the outer wall of the regenerative cooling body and used for
argon arc welding of the small end of the connecting ring. The filter screen is fixed to the inner side of the connecting ring in a spot welded mode through a filter framework. A plurality of unthreaded holes are evenly formed in the filter framework. According to the novel connecting structure for the head and the regenerative cooling body of the
rocket engine, the number of the weld joints is small, overlapped weld joints are avoided, and the connecting structure is high in reliability; numerical-control
welding can be achieved easily, and the
weld penetration consistency is good; through the arrangement of the
coolant filter screen, the capacity to
resist redundant pollutants of the engine is improved; and in addition, the appearance quality of the engine is good, and the expansibility is high.