Abstract: Two hundred and two cases（92 males and 110 females）of fibromyositis were treated by the use of fied effect therapeutical instrument.The age of the patients ranged from 19 to 75 years and the course of illness was from 3 days to 10 years. The results of treatment consisted of cure in 72 cases,marked improvement in 37 cases and failure in 5 cases.The total effective rate was 97.52%,with marked,improvement and over in 79.2%. These results are comparable to those obtained with other type of magnetic-field therapy, shortwave therapy,paraffin therapy,and ultra-short wave therapy in patieets with matched conditions.