The invention discloses a method for quickly placing samples of ground of a current collecting line. The method comprises the following steps of: A, inputting coordinates of a center
pile of the ground of the collector line into a CAD
software, wherein the center point of the ground is O; B, marking a rotation angle theta of the ground; C, making an angle bisector of the rotation angle theta, which is an axis of the ground, and making a vertical line of the axis through the center point O of the ground, wherein the other axis bases on the vertical line, to complete the axes of the ground; D, making two parallel lines of the axes of the ground according to
basic dimension given by a draw and a
lateral root opening value A, wherein the distance between the parallel lines and the axes is A / 2,and making 4 edges of a
pile cap according to the size of the ground; and E, using the CAD
software to mark the coordinates of the intersection of the axis and the edges of the excavation bottom, inputting to a GPS
measuring instrument, and placing lines according to the coordinates on spot. According to the method for quickly placing samples of the ground of the current collecting line, the needfor multiple measurements and calculations is eliminated, the error rate and work intensity are reduced, and the requirements for operators are reduced.