Compared with the traditional rigid pneumatic cylinder, the pneumatic muscle has many outstanding advantages such as large ratio between output force and diameter, large ratio between output force and weight. However, it can only provide the tension, can not provide the thrust force, it is a one-orientation output force component. In this paper, two different diameters pneumatic muscle, combined with the parallel and synchronous toggle force-amplified mechanism, a new type of multi-point press has been innovated. The large-diameter pneumatic muscle will be used for the working stroke of the pressure travel, while the small-diameter pneumatic muscle will be used for the return travel. The tension of the pneumatic muscle will decrease with the increases of the contraction; the force-amplified coefficient of the toggle mechanism will increase with the decrease of the pressure angle, which is taken full account of this complementary relationship between them. So the output force curve of the press is improved smoothly.
