Abstract: A water cup (100) having an exhaust pressure relief function, comprising a cup body (10) and a cup lid (20) mounted on an upper end of the cup body, wherein the cup lid is provided with an exhaust port (21) and a water passage port (22) that communicate with an interior of the cup body; the water cup further comprises a water extraction tube (30), the water extraction tube is movably disposed on the cup lid; when the water extraction tube is at a first position, the exhaust port and the water passage port are in a sealed state; when the water extraction tube (30) moves from the first position to a second position, the exhaust port (21) is in an open state; when the water extraction tube (30) moves from the second position to a third position, the water extraction tube communicates with the water passage port (22).