Non-invasive instrument for vascular endothelial function

The utility model belongs to the technical field of medical products, and particularly discloses a non-invasive instrument for a vascular endothelial function. The non-invasive instrument comprises a mobile control operation trolley, a computer with a double-screen monitor, a cuff type pressurizing device which is arranged on the upper limb of a detected person in a sleeving mode and is used for observing a lateral brachial artery and applying pressure, and a thermal image collecting and positioning background device. The non-invasive instrument further comprises a thermal infrared imager which is mounted on the mobile control operation trolley and is used for collecting thermal energy information emitted by the detected part of a human body, and the thermal energy information is converted into digital signals through a hardware circuit to be transmitted to the computer. The non-invasive instrument is more flexible and convenient to use, the thermal state distribution variation and the temperature fluctuation amplitude variation caused by the blood flow change of the entire upper limbs can be collected and observed simultaneously, the information is more abundant, and the vascular endothelial function can be accurately detected in time.