Based on the laser internal powder feeding cladding technology, the tip repair technology of ultra-thin variable width aviation turbine blades is studied. According to the blade geometric model, the trajectory planning is carried out, the variable width melt channel model is established, and the single-channel one-time scanning is realized layer by layer. A water-cooled copper plate clamping device is designed as heat dissipation protection at the blade tip. The CCD layer height control system is used to correct the height of the cladding layer in real time to the desired value. The experimental results show that the thickness of the cladding layer repaired on the blade substrate with a thickness of 0.2 mm~2 mm is between 0.67 mm and 2.49 mm, and the heights are generally the same everywhere. The metallographic microstructure is relatively uniform and dense, and there is no obvious crack defect. Variable spot cladding avoids the problems of multi-lap welding channel bulge and repeated heating, improving the cladding accuracy and efficiency. Meanwhile, it provides a reference for the repair and forming of ultra-thin and variable width parts.