The utility model provides a detachable electronic truck scale platform with a totally-enclosed cavity structure, which comprises single-unit scale platforms which are connected orderly, wherein the single-unit scale platforms comprise an upper panel, closed-end rib sections of a longitudinal trapezoidal section of the lower surface which are welded on the upper panel, and a weighing sensor is arranged under the upper panel. The scale platform is characterized by comprising two single-unit scale bodies whose shape are the same and by providing a transverse connecting component, wherein both ends of the transverse connecting component are respectively fixedly installed on the two single-unit scale bodies through screws, and the geometric shape of the lateral section of the single-unit scale bodies is eudipleural. The utility model has the advantages that the transport is convenient, the stress is symmetrically distributed, the availability ratio of materials is high, the investment cost is low, damages are not easily occur, and overlapped components have good force condition.