The invention relates to the technical field of artificial intelligence and data processing, and provides a method and a device for determining the vehicle queuing length of a sparse track, equipmentand a medium. According to the method, the longitudinal relative driving distance can be calculated by combining the coordinate data and the Link data, a vertical mapping mode is adopted, and the transverse drift error of low-speed driving of an estimation point in an intersection range can be eliminated to the greatest extent; non-queuing vehicles are used to correct the queuing length to obtaina corrected length, so that the error between an estimated queuing length and a real queuing length is eliminated; and the vehicle queuing length of the missing period is filled through Kalman filtering, so that the automatic determination of the vehicle queuing length is realized, and the determination of the vehicle queuing length is more accurate. In addition, the method can also be applied tosmart traffic, thereby promoting the construction of smart cities. The invention also relates to a block chain technology, and the vehicle queuing length can be stored in a block chain node.