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.

摘要： 小波域阈值滤波因其实现最简单，计算量最小而得到广泛的应用，但对不同信号而言，其阈值函数的选择将直接影响到滤波效果。由Gao HongYe提出的半软阈值法，因其参数实现算法的复杂度大而没有得到有效的应用。结合小波理论与模糊理论对半软阈值函数的参数提出一种新的计算算法，大大减少了算法实现的复杂度，并对其进行试验仿真，取得了良好的效果。