Reinforcement structure welding additive manufacturing method and welding additive reinforcement structure

The invention relates to a reinforcement structure welding additive manufacturing method and a welding additive reinforcement structure. The reinforcement structure welding additive manufacturing method comprises the steps that step 1, a first layer of welding accumulation is carried out on a test piece to be added, after the first layer of welding accumulation is completed, a welding gun moves vertically and upwards and then performs first interlayer wait; step 2, after the interlayer wait of the first layer is completed, a second layer of welding accumulation is started, after the welding accumulation of the second layer is completed, the welding gun moves vertically and upwards and then performs second interlayer wait; during the second interlayer wait period, the melted welding wire iscooled to form a drum-shaped structure with large middle size and small upper and lower end sizes, and a circle of annular concave parts are formed at the joint of the first layer of welding accumulation and the second layer