Arm circumference measuring sleeve

The utility model provides an arm circumference measuring sleeve which comprises an arm sleeve and a measuring device. The arm sleeve is provided with a long side and a wide side which are arranged in parallel and are vertically connected, the length of the long side is 10-30 cm, the long side can be wound, and the length of the wide side is 10 cm and cannot stretch out and draw back; the measuring device comprises a flexible rule, one end of the flexible rule is detachably and fixedly connected with one of the long edges, the length of the flexible rule is 10-30 cm, and the flexible rule can be wound in the same winding direction as the long edges. When the arm circumference measuring sleeve is used for measuring the arm circumference of a patient, the arm sleeve is wound on the arm of the patient, so that the long side without the flexible rule is fixed at the elbow cross grain position of the arm of the patient, the long side with the flexible rule is exactly positioned at the position 10cm above the elbow