The invention discloses an exoskeleton-type upper limb rehabilitant robot which relates to the field of medical devices and is used for assisting a cerebral apoplexy patient in completing two movements of bending and stretching of an elbow, inward rotating and outward rotating of a front arm and simulating exercise therapy for performing rehabilitation training. The exoskeleton-type upper limb rehabilitant robot is structurally characterized by mainly comprising a servo motor, a speed reducer, a shaft coupling, a pair of straight gears, a pair of conical gears, an electromagnetic clutch, a shaft, a sleeve, an upper arm support plate, an adjusting bolt, front arm support plates, coupling pins, limiting pins and a limiting baffle, wherein the shaft coupling is connected with the speed reducer and a first transmission shaft; the electromagnetic clutch is connected with a third transmission shaft and a fourth transmission shaft; the sleeve is connected with the first transmission shaft and a second transmission shaft through the coupling pins; a second cylindrical gear is connected with a gear support plate to form hinge connection; a first front arm support plate is connected with a second front arm support plate by the adjusting bolt; the second front arm support plate is fixedly connected with the third transmission shaft. The device is compact in structure, safe, low in cost, and can be worn and can be used in hospitals and families.