The invention provides a continuously-inflatable packaging airbag, which comprises an airbag body and an inflating channel. A plurality of hot streak edges are pressed on the airbag body; every two adjacent hot streak edges form an air chamber; the inflating channel is formed by air valves and an inlet channel; each air chamber is communicated with the inlet channel through the corresponding air valves; a printing ink layer and hot streak points are coated on the inner wall of the air valve; the air valves and an opening of the airbag body are pressed and sealed to form the hot streak edges; and the hot streak edges are positioned in areas of the printing ink layers; and through holes allowing air to pass through are reserved in the middle of the printing ink layers. When the airbag is used, goods to be packaged are put on the airbag body, the air is blown to the valves through the inlet channel to be filled into each air chamber, and then each air chamber is expanded to package and fix the goods to be packaged tightly to prevent the goods from swaying and being damaged during carrying, so the problems of high cost and poor retention effect of the conventional packaging measures are solved. The continuously-inflatable packaging airbag has light weight and the shape capable of being randomly changed according to different object shapes without limitation, is simple and easy to use, and makes contributions to the advocacy of conservation-minded society.