Objective: To compare differences of various indexes of cardiac function among elderly athletic patients with essential hypertension with abnormal circadian rhythm, and to explore relationship between CAP and abnormal changes of blood pressure circadian rhythm and its influencing factors in athletic patients with essential hypertension. Methods: A total of 190 athletic patients with Han nationality who were treated in General Hospital of Ningxia Medical University from September 2019 to February 2021 were selected, including 96 males and 94 females, aged (59.74+12.75) years old, their blood pressure circadian rhythms were detected, and nighttime rhythms were calculated Blood pressure drop rate, and divided into anti-configuration, non-configuration, configuration; To examine difference between CAP and reflected wave gain index (AI), ankle-brachial pulse wave velocity, velocity (baPWV) and ankle-brachial index mutual relationship. Result: ①The nSBP, nDBP and MAP of anti-configuration were higher than those of non-configuration and configuration. ②The dDBP and MAP of anti-configuration and non-configuration were lower than those of configuration. ③For every 10 years of age of hypertensive athletic patients, risk of reverse-type hypertension increased to 1.17 times; for every 10 years of medical history, risk of reverse-type hypertension increased to 1.16 times. ④For every 10 mmHg increase in central arterial pressure, risk of hypertension in reverse configuration increased by 1.13 times; for every 10 increase in correction index of central arterial pressure enhancement index (AIx75) at 75 beats heart rate, risk of hypertension in reverse configuration increased by 10. Sex increased to 1.26 times: baPWV was closely related to occurrence of hypertension in reverse configuration (P<0.05). Conclusion: The central arterial pulse pressure is related to rate of nocturnal blood pressure drop, and there is a certain relationship with occurrence of reverse configuration hypertension.