Abstract: A portable pet water bottle includes a bottle head, a connection cover, a rotary cover, a long gear, a bottle head seal ring, a water inlet pipe, an air exhaust pipe, a plurality of screw nuts and screws, a water outlet seal ring, an air inlet seal ring, a short gear, a water outlet, a plurality of positioning slots, a blockage slot, an air inlet, a cross seal ring, a lanyard, a backwater hole and a glass bead. The connection cover is provided with the rotary cover; the bottle head seal ring is arranged inside the rotary cover; the bottle head is fixedly connected to an outer wall of a top end of the bottle head seal ring. The top ends of the screws are threadedly connected to an inner wall of the bottom end of the bottle head.