Abstract
This paper deals with comparing three different estimators of fuzzy Reliability function of two parameters , kumaraswamy distribution , which is one of continouse probability distribution , were its Random variable X , taken values (0,1) .The methods of estimations are maximum likelihood (MLE) , moment estimator (MOM) , and percentiles method (PEC) after all estimators are found we compare fuzzy Reliability by simulation ,taking different values of parameters and sample size , all estimators of fuzzy Reliability function due to different sample size , and different sets of initial values , and explained in tables.