The invention relates to a locking-convenient fire observation door. The locking-convenient fire observation door comprises a door cover (1), a door frame (2), a pin shaft (3) and a pressing handle (4), wherein one edge of the door cover (1) is connected with one edge of the door frame (2) through the pin shaft (3); a convex block (5) is arranged at the other edge of the door cover (1); the pressing handle (4) is connected with the other edge of the door frame (2); and the left end of the pressing handle (4) is pressed against the convex block (5). When the locking-convenient fire observation door is required to be locked, the pressing handle is only required to rotate to be pressed against the highest point of the convex block, so that the operation is convenient, and the safety of workers is guaranteed.