Arteriovenous blood oxygen monitor

The invention provides an arteriovenous blood oxygen monitor, and belongs to the technical field of medical equipment. The arteriovenous blood oxygen monitor comprises a host, a vein detection assembly and an artery probe fingerstall; the vein detection assembly is provided with a detection patch suitable for being attached to a vein part of the human body; the vein detection assembly is connected with the host through a second connecting line; the artery probe fingerstall is connected with the host through a first connecting line; and at least one end of the artery probe fingerstall is provided with an opening, and an annular air bag is arranged at the opening end of the artery probe fingerstall. According to the arteriovenous blood oxygen monitor, the arterial blood oxygen saturation degree and the venous blood oxygen saturation degree can be measured at the same time, the annular fingerstall can adjust the fixing strength of the arterial probe fingerstall and the finger, adjustment is conducted according t