Abstract: The wavelet transform is a linear transform which has the time-frequency resolution,and it has no cross-terms to multi-component LFM signals.This paper proposes a parameter estimating method for multi-component LFM signals based on wavelet reassignment and Radon transform.This method firstly transforms the wavelet scale into the time-frequency distribution.For improving aggregation,the reassignment is involved,and then a Radon transform is done for parameter estimation.The results of simulations for single and double LFM signals show that this method is effective to improve the aggregation of time-frequency distribution.It saves time mostly for the following Radon transform and inhibits the noise at the same time.The effectiveness is improved obviously.