Soft intelligent materials can produce different deformation under some external stimuli (such as temperature, electricity, light, magnetic field, and so on) to demonstrate the activities. As the representative of the new intelligent soft active polymer materials, shape memory polymer and electro active polymer are showing significant potential. In the review, the actuation methods, applications of SMP in the aerospace field and its composites are introduced; in addition, the recent progress of theoretical studies and aerospace applications of dielectric elastomer are summarized.