By the cladding technology of inside-laser internal powder feeding, the crossing cross-forming technology of cross structure is studied using the strategy of local acceleration in the overlapping position. First, the cross-unequal height deposition process is proposed. According to the law of mass conservation, the mass of powder entering the molten pool and the forming mass of the cladding layer are calculated, and the influence laws of the first formed transverse melting channel on the height of the later formed longitudinal melting channel by the system of equations are obtained. Then, a mathematical model of the unequal height of the velocity is built. On the basis of the cross-unequal height deposition process, the scanning speed is calculated when the overlapping height of the crossed position is equal to the height of the melting channel in the uncrossed position. Finally, in view of the self-healing effect and volume flow hypothesis, a process is put forward to reduce the range of the acceleration section, which solves the problem of sags in the cross-linking part of the melting channels after the acceleration. The results reveal that the height error in the crossed position is within 1.76%. The overall microhardness is between 257.5 HV and 296.8 HV, and the surface of the final formed part is smooth and bright, without macroscopic cracks or inclusion defects.