The invention belongs to the technical field of noise eliminating equipment, and particularly relates to a noise eliminator for a vertical shaft generator set. The noise eliminator comprises a main noise eliminator, a noise eliminator middle segment and a noise eliminator tail segment; a noise eliminating pipe is arranged in the noise eliminator tail segment, an exhaust bent pipe is arranged at a connector of the main noise eliminator, the exhaust bent pipe and the noise eliminator tail segment are of an integral structure, the main noise eliminator is filled with a noise adsorption and thermal insulation material, and the space formed between the noise eliminator tail segment and the noise eliminating pipe is also filled with the noise adsorption and thermal insulation material. By means of the technical scheme, noise of the generator set can be effectively reduced. According to the scheme, the exhaust bent pipe and the noise eliminator tail segment are of the integral structure, therefore, gaps of the noise eliminator can be decreased, and noise propagation can be reduced; meanwhile, the main noise eliminator is filled with the noise adsorption and thermal insulation material, the space formed between the noise eliminator tail segment and the noise eliminating pipe is also filled with the noise adsorption and thermal insulation material, and therefore the noise of the noise eliminator can be better reduced.