The invention relates to a thin film transistor liquid crystal display (TFT-LCD) array substrate as well as a manufacturing method and a test method thereof. TheTFT-LCD array substrate comprises a display area and a peripheral area, wherein the peripheral area is internally provided with at least one first testing line and/or at least one second testing line; the first testing lines are parallel to data lines; gate lines and/or pixel electrodes are overlapped with the at least one first testing line; the second testing lines are parallel to the gate lines; and the data lines are overlapped with the at least one second testing line. The invention effectively overcomes the technical defect that a signal inside a liquid crystal display panel can not be tested in the prior art by installing the test lines in the peripheral area.