A new method for restrain the cro ss terms of time frequency distributions is presented.By introducing a phase adjust function(PAF)based on the WVD

this method can restrain the cross terms induced by the nonlinear character of the signal.And for multi-component signal

the CLEAN technique is adopted to filter out each component by a band pass filter

and the cross terms between the components are restrained.At the same time

this method has a high time frequency convergency

the simulated results demonstrate the validity of it.