A pet cage door, including a door frame disposed on a cage body, where door frame has multiple insertion buckles protruding toward one side of door frame, the door frame has a door stop capable of rotating relative to door frame to close same, the door stop has a door bolt capable of transversely sliding relative to same, one end of door bolt can be inserted with one of the insertion buckles, the door bolt's other end is connected to a vertical bar capable of transversely moving relative to the door stop along with door bolt, the vertical bar's end portion has a transverse bar that extends toward one side of the transverse bar, the transverse bar's end portion has a turning-back bar that extends toward one side of vertical bar and keeps spaced from transverse bar, and the turning-back bar can be inserted with door frame's other insertion buckle.
