Use control method and device of electric bicycle and electric bicycle

The invention provides a use control method and device of an electric bicycle and the electric bicycle. The electric bicycle comprises a bicycle body, a helmet and a helmet lock, the helmet and the helmet lock are arranged on the bicycle body, an NFC label is arranged on the helmet, and an NFC reader is arranged on the helmet lock; the method comprises the following steps: under the condition that the state of the helmet lock is an unlocking state, controlling the NFC reader to scan an NFC tag within a set range to obtain a first scanning result; according to the first scanning result, whether a helmet returning event of returning the helmet to a set position of the vehicle body occurs or not is determined; under the condition that the helmet returning event occurs, detecting whether the helmet meets a preset placement condition or not; the placing condition shows that the placing posture of the helmet is matched with a preset standard posture; and under the condition that the helmet meets the placement condi