Objective Liquid ramjet is the optimum power device for highdynamic nearspace vehicles because of its high thrustweight ratio, simple structure, and lightweight. Ramjet technology is being extensively developed by the military around the world. However, during a rigorous test, the welding spots between the flame tube and reinforcement ring of a ramjet, which was identified as the weak link, were damaged. The flame tube and strengthening ring are both made of GH3230 superalloy. First, resistance spot welding is used to weld the two parts. Moreover, laser welding was chosen as the welding method because of its high energy density, fast welding speed, and excellent welding quality. However, there is still the possibility of weld tearing between the two parts.Currently, the shape of the laser welding spot is a popular study area, and optimizing it can significantly increase welding strength and quality. Thus far, several researchers have proposed various welding shapes, such as ringand Cwelding spots. It was found that the shear performance of welding spots has a positive connection with the area of fusion surfaces. Furthermore, the ringwelding spot welding path is considered a closed curve, which is unfavorable to stress release. The Cwelding spot welding path is open and can release stress; thus, it is superior to the ringwelding spot. However, the existing weld shapes still have insufficient welding strength, which reduces the reliability and assembly precision of the products. Therefore, four weld shapes, such as ring -, C -, oval -, and Swelding spots, were designed based on the real structure of the product. The differences in performance between the welding spots were compared to determine the best welding scheme. This study can be used as a reference for welding ramjet products, and it has both innovative and practical values.