Rigidity is a key index to the quality of quartz reed, and the vibration characteristic of the quartz reed is a key parameter reflecting its rigidity. For the different component separation problem of signal before executing precise frequency estimation in rigidity measurement of quartz reed with laser triangulation, the wavelet transform is used as a profiling tool to implement the separation of free vibration signal and reverse vibration signal. Experimental results show that it is an effective method in the rigidity measurement of quartz reed.