This paper talks about method to enhance vibration signals gotten by hitting iron pipe to cause a vibrating response from which the damaged pipe information will be found. However, the reflection wave is usually too weak to acquire useful information correctly. The method, in which mccltiple similar signals are superposed, can not only decrease the noise in the signal, but also receive more message that may be lost before because of the interval of sample collection. Since the noise in signals could be treated as white noise, after multiple superposition the added noise will become to zero. The programmed the software to performs efficiently and conveniently. There are some examples in practice to express that this method is correct.