A drinking cup cover having a straw tip automatically releasable upon pressing, comprising a cup cover (1), a handle loop (9) being provided at one side of the cup cover (1), and a mounting platform (2) being provided in the cup cover (1); a through hole (3), an air inlet (4), and a button groove (5) are provided in the mounting platform (2); a straw (31) made of soft rubber is provided in the through hole (3); a straw tip (32) is provided on the straw (31); a rotary sleeve (33) made of hard plastic is sleeved on the straw (31), and the rear end of the straw tip (32) is in sealing contact with the front portion of the rotary sleeve (33); front studs (34) and rear studs (35) are provided at both sides of the outer wall of the rotary sleeve (33); the front studs (34) are connected to a straw lid (6); front stud holes (61) and pull hook grooves (62) are provided in the straw lid (6), and the front stud holes (61) fit the front studs (34); rear stud holes (21) are provided in the inner wall of the cup cover (1) a
