The utility model relates to a wind-spring type expandable sampling rod which is characterized in that: the wind-spring type expandable sampling rod comprises a bracket, a wind spring contraction case and a motor are arranged on the bracket, the wind spring contraction case comprises a shell and an elastic rod with C-shaped cross section, an inlet and outlet for leading the elastic rod in and outis arranged on the shell, a reverting wheel disc is rotationally connected on the shell, one end of the elastic rod is connected with the reverting wheel disc, a convex rolling wheel is connected on a rotating shaft of the motor, and the convex rolling wheel is rotationally connected with the bracket, a concave rolling wheel bracket is connected on the bracket in a sliding way, and a concave rolling wheel matched with the convex rolling wheel is connected on the concave rolling wheel bracket, the other end of the elastic rod is held between the concave rolling wheel and the convex rolling wheel, the sliding direction of the concave rolling wheel bracket is parallel to the holding force for holding the elastic rod, a tension spring is connected between the concave rolling wheel bracket andthe bracket, a cavity is arranged on the reverting wheel disc, a column is arranged in the cavity, and the column is fixed on the shell, and an expandable wind spring is connected between the column and the reverting wheel disc.