The invention relates to a convenient-to-carry multi-functional hydraulic electricity generating device capable of rapidly generating electricity. The convenient-to-carry multi-functional hydraulic electricity generating device comprises a transmission box, an electricity generating box, a water collecting tank, a transmission mechanism, a folding mechanism, a water collecting mechanism, a water receiving mechanism, an electricity generating mechanism and a fixing mechanism; the water collecting mechanism comprises a second motor, a sixth gear, a first rack, a first connecting rod, a second connecting rod, a third connecting rod, a water collecting cover, a supporting frame, a spring and a lock cylinder; and the water receiving mechanism comprises a third motor, a second worm, a seventh gear, a second rack, water collecting rods, and a water collecting frame. According to the convenient-to-carry multi-functional hydraulic electricity generating device capable of rapidly generating theelectricity, through cooperation of the water collecting mechanism and the water receiving mechanism, the flow speed of water can be increased, and thus the electricity generating efficiency is improved; and through cooperation of a first electricity generating unit and a second electricity generating unit of the electricity generating mechanism, electricity generating can be quickly achieved, thedemands for electricity in most emergency situations are met, and practicality is improved.