Non-invasive arterial blood pressure monitor

The invention relates to the technical field of medical instruments, in particular to a non-invasive arterial blood pressure monitor which comprises a fixing ring; a sensor assembly comprises an installation structure connected with the fixing ring, a suction cup structure arranged on the installation structure and a pressure sensor arranged in the suction cup structure, the pressure sensor comprises an arc-shaped base and a pressure sensing unit arranged on the arc-shaped base, a sliding rail is arranged on the installation structure, the suction cup structure comprises a sliding block matched with the sliding rail and a cup body connected with the sliding block, and a cavity communicating with the cup body is formed in the sliding block; and a gas supply device is communicated with the cavity of the suction cup structure through a connecting pipeline, and the suction cup structure has a first state in which pressing force facing a monitored part is applied to an internal pressure sensor under the gas pressu