The invention relates to a clamping buckle self-timer cup, and aims to solve the technical problem that existing similar self-timer tool structures and cup structures are poor in design, inconvenient to produce, carry and use and simple in function. A cup base is arranged at the bottom of a plastic cup body of the cup. The water cup is characterized in that a cup cover of the plastic cup body is provided with a clamping buckle, a mobile phone is clamped in the clamping buckle, a telescopic rod is arranged on one side of the cup base, one end of the telescopic rod is connected with the cup base through a knob, the clamping buckle is provided with a C-shaped cover clamp, a buckle hole in the bottom of the cover clamp and one end of a U-shaped buckle head are buckled, the other end of the buckle head and a cup cover are buckled, namely, an opening end of the buckle head and the cover clamp are buckled, a jacket is arranged on the periphery of the buckle head between the cover clamp and the cup cover, a clamping opening of the cover clamp is larger than the diameter of the cup cover, a bulb is arranged at a joint of the buckle head and the cover clamp, the buckle head is limited in a buckle hole in the inner side of the cover clamp through the bulb, an open rod groove is formed in the side periphery of the telescopic rod of the plastic cup body, and the folded telescopic rod is placed into the rod groove of the plastic cup body.