The invention relate to dynamic weighing equipment of a road vehicle. The dynamic weighing equipment comprises a first weighing platform, a second weighing platform, a first sensor group, a second sensor group, and a weighing instrument. The first weighing platform and the second weighing platform are arranged in a same frame or in a same ground pit. The sensor group installed on the first weighing platform is used for detecting the weight of a single axle of a vehicle passing by the first weighing platform. The second sensor group installed on the second weighing platform is used for detecting the weight of a single axle of axle group of a vehicle passing by the second weighing platform. The weighing instrument connecting the first sensor group and the second sensor group contains an axle weight collection unit and a weight correction unit; the axle weight collection unit is used for collecting single axle weight signals of all axle groups of the vehicle successively from the first sensor group and collecting axle group weight signals of all axle groups from the second sensor group; and the weight correction unit connected with the axle weight collection unit calculates final weights of all axle groups based on all single axle weight signals and all axle group weight signals.