At present, laser cladding forming techniques are generally difficult to realize the formation of an unsupported capping structure. Using the intra-powder powder feeding technology and the oblique stratification method, the lap joint cap forming across multiple straight walls was studied, and the spatial oblique bridging stacking was realized. The distribution of annular laser energy under different oblique angle projections of light-fed powder-fed nozzles was discussed. The influence of tilt deflection angle on the appearance of cladding was investigated. The layer height measurement and control technology is introduced to detect and control the height of the cladding layer in real time to ensure that the stacking morphology is not unstable. The results of the structure inspection of the bridging cap forming structure show that the surface of the space cover overlap is flat, the wall thickness is uniform, and the hardness is generally stable.