Internal construction device and method for containment dome of nuclear power station

The invention provides a nuclear power station containment dome interior construction device and method, the nuclear power station containment dome interior construction device comprises at least one suspension platform and a conveying mechanism, each suspension platform comprises a body and at least one channel port arranged on one side of the body, the body is internally provided with a construction space, and the construction space covers a to-be-constructed area of a containment dome; one end of the body is fixedly connected with the inner wall of the containment dome; the conveying mechanism is arranged in the containment and located above the channel opening, and the conveying mechanism is used for conveying personnel and equipment to the channel opening. According to the nuclear power station containment dome internal construction device, the suspension platform is installed on the containment dome instead of being arranged on an annular crane, so that the situation that a permanent channel structure i