A method for automatically detecting connection line order of electrical tilt antennas, includes: adjusting, by an electrical adjustment unit, electric down-tilts of electrical tilt antennas corresponding to the electrical adjustment unit, and collecting, by antenna portals, pre-determined parameters of reflected signals corresponding to n electric down-tilts; calculating statistical characteristic parameters of the pre-determined parameters according to the values of the pre-determined parameters of the reflected signals corresponding to n electric down-tilts and a pre-determined mathematical statistics algorithm, the statistical characteristic parameters being used to represent the discrete degree of the pre-determined parameters; and if the value of the statistical characteristic parameter is greater than a pre-determined threshold, the connection line order between the electrical tilt antennas and a base station being determined to be correct.