Abstract: The laser deposition repaired GH4169 superalloy after 1 050 ℃×30 min solid solution treatment was carried out to pulse current treatment with different pulse current duration （5, 10, 20 min）. The effects of the pulse current duration on the microstructure and tensile properties of the alloy were studied. The results show that compared with superalloy before the pulse current treatment, the volume fraction and size of Laves phases of the superalloy after pulse current treatment with different pulse current duration were smaller, and the tensile strength and yield strength were larger. With the increase of the pulse current duration, the volume fraction and size of Laves phases decreased, and the main shape changed from long strip-like to coarse granular, large granular, and small granular. The tensile strength and yield strength increased, and the density of the ductile pits at the tensile fracture surface increased, with the size and depth decreasing. When the pulse current duration was 20 min, the tensile strength and yield strength were the largest, which increased by 17% and 6% respectively compared with superalloy before the pulse current treatment.