Forming force is an important parameters of incremental forming process.The incremental forming force includes mixed noise containing pulse interference and white noise in the incremental forming force detection process.To overcome the problem,a de noising method based on wavelet transform and mean filtering was proposed. The steps of the method based on wavelet transform and mean filtering were described,the parameter selection of the wavelet threshold de-noising for forming force signal were researched.The experimental result shows the reliability and validity of the method.