Abstract: Fuelling machine, the refueler for vihecles, is the important tool serving customers directly. In order to make full use of it, the following requirements are listed for fuelling machine development: ①Multi -funttion: It is required to increase its functions so as to be able to blend oils, auomize its operation, realize self protection, and prevent oil dissipation; ②Multi-level safety features.-such as auto-closing/fusing at pipe rupture, fire or oil escape; ③Multiple options: including magnetic card, keys, keyboard, etc.; ④Multi massage display or printout: including all the information necessary for the user, such as preset quantity, actual quantity filled, instantaneous flow, unit price, payable, etc.