A myocardial bridge simulator is made and an experimental model is built to simulate and study the blood pressure and the blood flow under the compression state.Through the experiment,it is found that,when the compression percentage closes to 20%,the compression pressure at the far end changes quickly and differs from that at the near end;and when the compression percentage is less than 20%,the compression pressure at the near end rises quickly and that at the far end transits from instability to reverse distribution state.The blood flow increases with the increment of the compression degree when heart rate and the blood pressure range at the near end are invariable.