The invention belongs to the technical field of fresh food storing devices, in particular to a portable live fish storing device. The portable live fish storing device comprises a transparent barrel,an oxygen supply component, a handle, an inflating nozzle and a waterproof sealing zipper, wherein the oxygen supply component is used for charging air in water in the transparent barrel. According tothe portable live fish storing device disclosed by the invention, in the form of rotary charging of the air, the air charged into the water can be in better contact with the water, so that the dissolution degree of the oxygen in the air in the water can be increased, further oxygen consumed by the live fish in the water can be better complemented, and the survival rate of the live fish can be increased. Besides, a pressure valve is arranged, so that the inner part of the transparent barrel has certain pressure, the larger the pressure is, the larger the dissolution degree of the oxygen in thewater is, the dissolution degree of the oxygen in the air in the water is further increased, and the survival rate of the live fish is further increased. The portable live fish storing device can beused for long-distance transportation of the live fish, or can be used as a portable fish tank by children, and the carrying convenience of the children is improved through a fully-sealed structure.