The invention discloses a manual and automatic integrated bolt opening mechanism which is mainly installed on a remote control weapon station. The manual and automatic integrated bolt opening mechanism is composed of components such as a machine base, a bolt opening motor, a bolt opening lever, a manual bolt opening assembly and a position sensor; and the manual bolt opening function and the electric control bolt opening function are achieved. The manual and automatic integrated bolt opening mechanism is arranged on the side face of a machine gun, local adjustment is carried out according to different matched gun types, and it is guaranteed that the machine gun can complete the bolt opening motion. During manual bolt opening, a bolt opening pull handle is held with one hand or both hands and is pulled in the gun tail direction until the bolt opening motion is completed, and the bolt opening pull handle is placed into a clamping groove; and during electric control bolt opening, a shooter operates a weapon control platform in a car to conduct electric control bolt opening operation, and finally bolt opening is completed. An original manual bolt opening mechanism can be replaced by the bolt opening mechanism, motion is reliable, the structure is compact, the weight is small, operation is easy and convenient, and maintenance is convenient.