The invention provides an unlocking type space remote-sensing camera support which comprises two pressing pieces; the two pressing pieces surround the connecting part of a support upper body and a support lower body so that a compression ring is formed at the connecting part of the support upper body and the support lower body; two first wedge-shaped pieces are arranged on the inner surface of atleast one of the two pressing pieces; second wedge-shaped pieces are formed in the outer surface of the support upper body and the outer surface of the support lower body; the second wedge-shaped pieces of the support upper body fit with one of the two first wedge-shaped pieces of the at least one of the two pressing pieces; the second wedge-shaped piece of the support lower body fit with the other of the two first wedge-shaped piece of the at least one of the two pressing pieces; one end of each of two locking pieces is connected with one of the two pressing pieces through a hinge, and the locking piece fits with the other of the two pressing pieces; and the other end of each of the two locking pieces is fixedly connected through an explosive bolt.