Abstract: To extract line tracks in clutter environment,modified Hough transformation method using fuzzy accumulation function is introduced.The affection of radar error to accumulation function is concerned in this method,which takes the membership degree of fuzzy logic function as the accumulation object to form the peaks in the parameter space.The peaks made from new accumulation function are sharper.Details of algorithm about track initialization are described,which makes use of decay coefficient to keep the real-time property of accumulation function.To validate the algorithm,simulations are done for line tracks in clutter environment based on versatile radar error parameters.Through simulations,the increasing accuracy of line tracks extraction by fuzzy accumulation method is validated,which will decrease the number of candidate tracks and releases the burden of consequent track validation procedure.