Abstract: The waveshrink has been widely used in the filtering because of the simplest realization and the smallest amount of computation.According to the different signals，the filtering effect will be directly affected by the choice of shrinkage function.The semisoft shrinkage proposed by Gao HongYe has not been effectively applied because of the complexity of the parameters’ algorithm.In this paper，a new calculation algorithm of semisoft shrinkage function is proposed through combining wavelet theory with fuzzy theory，and it can greatly simplify the complexity of the algorithm.And also the experimental simulation shows that it has obtained the good results.