The invention discloses a fuel-supplying method for the two-stroke cycle spark ignition engine. The engine has an air cylinder, an cylinder head which seals one end of the air cylinder, a piston and an exhaust port which is axially separated from the cylinder head and is positioned on the cylinder wall; the cylinder head has a cavity communicated with the air cylinder and a ignition unit is arranged in the cavity. The method includes: to inject the measured fuel into the air cylinder from the space between the exhaust port and the cylinder head, and guide the other part of fuel to the air cylinder area opposite to the radial plane of the air cylinder at a fuel injection point. |