Based on the wire laser additive manufacturing, this paper innovatively proposes a new process of additive manufacturing of laser wobble fuse combined with laser swing welding technology. Firstly, the laser power P, wire feeding speed V_s, and printing speed V_p are controlled in the process without laser swing, and the appropriate swing frequency f, swing amplitude A and overlap rate η are adjusted under circular swing. A single-channel experiment was performed on TC4 titanium alloy, and it was found by comparison that the deposition quality was better when P = 2500 W, V_s = 3 m/min, V_p = 2.5 m/min, f = 300 Hz, A = 1 mm and η = 50%. Based on the single-pass experiment, multi-pass multilayer printing was carried out, and the microstructure and phase of the as-deposited state and after annealing were analyzed by XRD, TEM, SEM and EBSD. The results show that the microstructures are mainly slender acicular martensite α′ and initial columnar β grains under single-pass printing and multi-layer multi-pass printing. In addition, the β grains are irregular in shape, the growth orientation changes obviously, the α′ size is small, and the structure is closely arranged, which is a typical widmanstetten structure. After recrystallization annealing (800 ℃/2 h, furnace cooling), the grain boundary of α phase appears, and the α phase tends to grow.