Aiming at the problem of high noise of power vehicle, Frequency Spectrum characteristics of the noise of diesel generator in the compartment was measured and analyzed. The compartment of the power vehicle was designed as enclosed three cabins: managing cabin, gen-sets cabin and anechoic cabin. Intake and exhaust mufflers were designed to control the noise produced by air intake and exhaust; acoustic absorption and insulation structures were arranged on the walls of each cabin; two triangle absorption columns were designed in anechoic cabin to absorb the fan noise, vibration noise and the other noises emanated from gen-sets chamber. Finally an experiment was made and we found that the noise had a reduction of about 25~30dB and the noise outside of the vehicle was under 75dB after the diesel generators were arranged in the vehicle, so the noise control methods can meet the requirements of quiet power vehicle.