The invention discloses a feed-forward coaxial feed source for a microwave antennae, which comprises a feed chamber, a frame connected to the chamber, and a feed source connection cable, wherein a feed gun is positioned at the connecting part of the feed source connection cable and the feed chamber. The direction in which the feed gun is pointed to the feed chamber is the power feed direction. The feed source is characterized in that: an included angle (alpha) is formed between the power feed direction and the frame plane, and the included angle is in the range that alpha is more than 0 DEG and less than or equal to 90 DEG, wherein the power feed direction is most preferably perpendicular to the frame plane. The feed source reduces the negative effects on the structure thereof through changing the projection area and angle of the frame on the parabolic plane, and simplifies the structure while reducing the minor lobes in the main polarization direction, increasing the gain and improving the cross polarization. Furthermore, the invention has good promotion value.