Underwater stepping multi-connection release mechanism

The invention belongs to the field of ocean underwater observation, and particularly relates to an underwater stepping multi-linkage release mechanism which is characterized in that a stepping motor is fixed in a sealed cavity, a rotary output shaft is rotatably mounted on the sealed cavity in a sealed manner, the inner side of the rotary output shaft is connected with the output end of the stepping motor, and the outer side of the rotary output shaft is used for being connected with a coupler; the upper cover plate and the side vertical plates are connected to the bottom plate, a plurality of rotating plates capable of rotating are arranged between the two side vertical plates, a limiting plate is arranged between every two adjacent rotating plates, springs are arranged between the rotating plates and the lining plates, and the small transverse shaft sequentially penetrates through the side vertical plates, the rotating plates and the limiting plates. Limiting grooves with different angles are formed in the