The invention discloses a method for quickly measuring and adjusting a parabolic cylinder antenna. The method comprises the following steps: computing height difference of various nodes on a horizontal plane according to a theoretical surface of the parabolic cylinder antenna; erecting a level gauge on the front of the antenna to measure the heights of various nodes and adjusting to a condition that the height difference of various node conforms to a theoretical value; erecting the level gauge at the side of the antenna to measure the heights of various nodes, and adjusting the heights to thelocation equal to the front node; and finally realizing quick measurement and adjusting on the surface of the parabolic cylinder antenna. The method disclosed by the invention can be extensively suitable for the measurement and adjusting of the parabolic cylinder antenna surface, especially a parabolic cylinder antenna in a hanging and unfolding state.