The invention relates to the technical field of powder pressing, in particular to a dry-type quasi-isostatic pressing method and device. The quasi-isostatic pressing method comprises the following steps: an elastic mold, in which a raw material to be pressed is placed, is arranged in a high-pressure chamber fully filled with an elastic quasi-fluid of sufficient fluidity, and the elastic quasi-fluid uniformly transmits pressure applied to the high-pressure chamber to all surfaces of the elastic mold, so that quasi-isostatic pressing of the raw material to be pressed is realized. The high-pressure chamber of the quasi-isostatic pressing device disclosed by the invention is placed in a pressure bearing frame and is rigidly fixed with the pressure bearing frame, and pressure is exerted on a pressing column by utilizing a common tablet press, so that quasi-isostatic pressing can be fulfilled, and the dry-type quasi-isostatic pressing method and device can be widely applied to design of various types of isostatic pressing machines. According to the dry-type quasi-isostatic pressing method and device, the problems that the conventional isostatic pressing machine has high requirements on sealing of the high-pressure chamber, unsafety is caused by high leaking possibility of a liquid medium, pressed products are easy to pollute, the pressing effect is poor and the like are solved; and the dry-type quasi-isostatic pressing device is relatively small in size, and simple, convenient and efficient to operate.