An automatic-alarming push-down type emergency door-locking device, disposed at a door board, includes a main lock seat, a secondary lock seat, a push-down type handle assembly, a position-sensing module and an alarm module. The main and secondary lock seats are disposed at the door board, and the main lock seat has at least one locking element. In the push-down type handle assembly, a first handle and a second handle are connected pivotally with the secondary and main lock seats to be moved along a driving path from a locking position toward an unlocking position. At the locking or unlocking position, the locking element is buckled with or separated from the at least one locking groove. The position-sensing module transmits an alarm-triggering signal for the alarm module to generate an alarm, upon when the first handle leaves the locking position.

A delayed unlocking push-down type emergency door-locking device includes a main lock seat, a secondary lock seat, a push-down type handle assembly, a position-sensing module and a timing electromagnetic traction assembly. The push-down type handle assembly is configured for moving along a driving path from a locking position toward an unlocking position, thereby at least one of locking element of the main lock seat is separated from a locking groove to unlock. A stopper is disposed at the secondary lock seat, configured for moving between a stop position and an avoidance position. The timing electromagnetic traction assembly is configured for counting time upon when the position-sensing module detects the push-down type handle assembly is separated from the locking position, and for pulling the stopper from the stop position to the avoidance position after delaying a predetermined delay time to the unlocking position for delaying.

A delayed unlocking push-down type emergency door-locking device includes a main lock seat, a secondary lock seat, a push-down type handle assembly, a position-sensing module and a timing electromagnetic traction assembly. The push-down type handle assembly is configured for moving along a driving path from a locking position toward an unlocking position, thereby at least one of locking element of the main lock seat is separated from a locking groove to unlock. A stopper is disposed at the secondary lock seat, configured for moving between a stop position and an avoidance position. The timing electromagnetic traction assembly is configured for counting time upon when the position-sensing module detects the push-down type handle assembly is separated from the locking position, and for pulling the stopper from the stop position to the avoidance position after delaying a predetermined delay time to the unlocking position for delaying.