The invention relates to an external skeleton assisting robot, in particular to a portable energy-storage type external skeleton assisting robot. The problems that an existing lower limb external skeleton assisting robot worn on the human body is poor in assisting effect so that the loading capacity of the human body can be reduced, the wearing comfort for the human body is poor, the universality is poor, and the field environmental suitability is poor are solved. The portable energy-storage type external skeleton assisting robot comprises the upper body back, the left leg and the right leg, and the left leg and the right leg respectively comprise a hip driving system, a thigh driving system and a shank wearing system. A hip joint energy-storage mechanism comprises a connecting base, a stretching rod, a second spring and a stopping sheet, and a first bevel gear is meshed with a second bevel gear. Each hip driving system comprises a second motor with a coder, a second reducer, a third bevel gear, a fourth bevel gear, a thigh connecting rod, a knee joint support, a knee joint connecting plate, an angle sensor, a series connection elastic combination body, a knee joint gearbox body, a knee joint shaft and an end cover. The portable energy-storage type external skeleton assisting robot is suitable for being worn outdoors for walking assisting.