The invention discloses a linkage interlocking door. The linkage interlocking door comprises at least two safety door bodies. Each safety door body comprises a door frame and a door leaf. A channel is formed between two adjacent safety door bodies. The safety door bodies are further provided with automatic locking devices. The automatic locking devices are all coupled to an interlocking circuit. Each automatic locking device comprises a lock and an electronic control unit. When the locks are unlocked, the corresponding electronic control units output unlocking signals, and when one of the electronic control units sends the unlocking signal, the interlocking circuit outputs locking signals to the rest of the electronic control units; and when the rest of the electronic control units receive the locking signals, the corresponding locks are locked. During normal use, the inner safety door body and the outer safety door body of the linkage door cannot be opened at the same time to form the channel. Due to the internal opening function of the inner safety door body, the linkage door should be controlled by an electronic control device to be opened in the state that the outer safety door body is locked. When the inner safety door body and the outer safety door body of the linkage door are simultaneously opened for 2 min, the linkage door should send out prompt sound. The linkage door should have the function that the inner safety door body and the outer safety door body are simultaneously opened to form the channel.