Abstract Stochastic Resonance (SR) can not only be used in detecting feeble signal, but also recover waveforms contaminated by noise. But we know that how to adjust SR’s parameters has always been a big problem in signal processing. In order to solve this problem, we study and explore the SR of the small-parameter and large-parameter signal, and also do some research in adjusting parameters of single potential as well as bistable transition resonance. At the same time, through studying the mechanism of signal recovery，we analyze the causes of resulting in pulse distortion during signal recovery. We also give some useful advice of avoiding waveform distortion. It has been proved that this method can be used in the SR signal recovery by both theoretic numerical simulation and engineering data analysis.