Abstract: In order to investigate the effect of ultrasonic frequency on laser clad coatings, five sets of control experiments were conducted to investigate the macroscopic morphology, microstructure and wear resistance of TiCN-enhanced nickel-based coatings by applying ultrasonic frequencies of 0 kHz, 26 kHz, 30 kHz, 34 kHz and 38 kHz. The results showed that: the application of ultrasound did not generate new phases in the coatings and promoted the generation of TiCN-enhanced phases to some extent; the number of bubbles in the coatings decreased with increasing ultrasound frequency, the grains were finer and tighter, and the agglomeration phenomenon in the coatings was reduced; the microhardness of the coatings increased with increasing ultrasound frequency, and the microhardness of the coatings was highest and varied smoothly when the ultrasound frequency was 38 kHz; compared with the coatings without the application of ultrasound, the microhardness of the coatings with the application of 38 kHz was higher. Compared with the coating without ultrasound, the coating wear at 38 kHz was reduced by about 30%, and the main wear was changed from adhesive wear to slight plowing.