The present invention relates to a fuel injection method for a compression-ignition direct-injection internal-combustion engine comprising at least a cylinder (10), a cylinder head (12) carrying fuel injection means (14), a piston (16) sliding in this cylinder, a combustion chamber (34) delimited on one side by upper face (44) of the piston comprising a teat (48) extending in the direction of the cylinder head and arranged in the centre of a concave bowl (46) with at least two mixing zones (Z1, Z2), said injection means projecting fuel in at least two fuel jet sheets (36, 38) with different sheet angles (A1, A2), characterized in that it consists in injecting into the combustion chamber the fuel jets (40) of one (36) of the sheets in a radial direction (C1) forming a non-zero angle (b2) with the radial direction (C2) of fuel jets (42) of the other sheet and in admitting the oxidizer in a swirling motion with a swirl number less than or equal to 1.5.