A sampling basket throwing device of a manned submarine comprises a spherical hinge support provided with a first groove. A spherical head at one end of a connecting pin is jointed with the first groove, the spherical head and the first groove can be disengaged from each other, the other end of the connecting pin is connected with a second groove, the second groove comprises two split-half grooves I formed in a rotational seat and a fixed seat, the rotational seat is hinged to a connecting frame, the rotational seat rotates to enable the two split-half grooves I to be coupled or uncoupled, a first through hole is formed in the fixed seat, a second through hole is formed in the rotational seat, the first through hole communicates with the second through hole axially to form an integral through hole, a pull rod extends into the integral through hole through one end of the integral through hole, the extension end of the pull rod is provided with an internal threaded hole, an explosive bolt extends into the integral through hole through the other end of the integral through hole, the rotational seat and the fixed seat are fixedly connected through the threaded connection of the explosive bolt and the internal threaded hole, the spherical hinge support and the fixed seat are fixedly connected with the connecting frame, a suspension bracket is connected to the middle pin section of the two ends of the connecting pin in a sleeving way, and the suspension bracket is fixedly connected with a sampling basket. According to the invention, the sampling basket is thrown by adopting electric drive, and the operation is reliable.