The invention discloses a transfer trolley vehicle-mounted weighing electronic settlement system. The system comprises a vehicle-mounted weighing sensor device, a weighing terminal device, a user handheld terminal device and an electronic settlement platform. By means of the weighing sensor device and the weighing terminal device, commodity weighing can be completed after commodities are carried to the transfer trolley, the purpose of weighing, namely transfer, is achieved, weight information is transmitted to the user handheld terminal, and the trouble that the commodities are weighed first and then carried is avoided; through input of user commodity information and three-party confirmation of a seller, a buyer and a weigher, the possibility of transaction errors is avoided, and completetracing information of the agricultural and sideline product transaction process can be formed. Through a user code scanning payment mode, boundaries of credit card, debit card, Alipay and WeChat payment are guaranteed, high-efficiency electronic settlement is realized, and subsequent problems caused by cash transaction and on-credit and under-credit transaction are avoided.