The invention relates to a tricycle-mounted weighbridge platform. The tricycle-mounted weighbridge platform includes a tricycle body and a weighbridge body. The weighbridge body includes an object support platform, supporting legs, a pressure sensor, a display and a controller. Four mounting bases are arranged at the bottom surface of the compartment of the tricycle body. Four supporting legs of the weighbridge body are correspondingly arranged in the mounting bases. A front compartment plate of the tricycle body is provided with a controller insertion groove, a display insertion groove and a power socket. The controller and the display are arranged in the corresponding insertion groove. The controller is connected with the pressure sensor and the display, and is connected with the power socket through a power line. After the weighbridge is mounted on an electric tricycle, the tricycle-mounted weighbridge platform is flexible and convenient to use without being geographical position constraint, and can move and stop at any moment, wherein the maximum capacity of the weighbridge is 1-5 tons, and is determined following the demand of a customer.