Abstract: In order to perform differences between two similar Electrocardiogram(ECG) waves on partition points, a method based on Haussdorff distance is proposed according to wave characteristics. This method differentiates the critical point among different kinds of ECG waves. A description method named inclusive degree is proposed based on repeated experiments. This method is used to describe situations about similar waves in the vicinity of partition points among different measurement methods. Experimental results show that the average classification sensitivity of this measurement method is above 90%. Comparing with other measurement methods, the result shows that the method has the better discrimination.