Abstract: A sphere with velocity measurement function comprises a sphere and a velocity measuring device arranged in the sphere, the velocity measuring device comprises a base body, a speedometer and a power supply, the speedometer and the power supply are used for operation and control; the speedometer uses an approach capacitor sensor as a switch of a trigger circuit, the approach capacitor sensor comprises a sensing plate electrode, sensing plate electrode contacts and a conductive ink layer, the sensing plate electrode is arranged on the base body, the conductive ink layer is coated on the inner surface of the sphere, and the sensing plate electrode contacts are arranged in the conductive ink layer; when the base body is placed in the sphere, the conductive ink layer contacts the sensing plate electrode; the present invention also comprises a display screen for displaying results, the display screen transmits data with the speedometer a wire or wireless way; and the approach capacitor sensor is not influenced by th