The invention provides a booster bicycle with an adjustable magnetic block position sensor arranged on a motor shell, and discloses an electric booster bicycle capable of providing booster signals by multiple-point position sensing. The sensor comprises a sensing element, a booster model processor, a digital-analog converter and an operational amplifier which are connected in sequence, wherein a plurality of permanent magnetic blocks with opposite adjacent magnetic polarities are fixedly arranged on a motor shell which is taken as the sensing element, the distance between the permanent magnetic blocks can be adjusted, the hall of the sensing element is arranged on a frame close to the permanent magnetic blocks, the operational amplifier is connected with a motor controller. The booster bicycle has the advantages that the hall can obtain square wave signals, the sensor can be used for outputting after the digital processing, a booster model can be set artificially, the distance between the booster model to the booster start point, the distance between the booster model to the booster finishing point, and the booster power are adjusted to be reasonable, so that a user and a machine can be best matched, and the power is saved.