Four-axis three-dimensional trapezoidal reaction frame

The utility model discloses a four-axis three-dimensional trapezoidal reaction frame, which comprises four anchoring footstands which are distributed at four corners of a rectangular plane, and each anchoring footstand is fixed on the ground through an anchor rod; the number of the dowel bars is four, the dowel bars are in one-to-one correspondence with the anchoring footstands, and the lower endof each dowel bar is hinged to the corresponding anchoring footstand; and the four corners of the counter-force frame body are provided with penetrating holes corresponding to the force transmission rods in a one-to-one mode correspondingly, and the upper sections of the force transmission rods are movably inserted into the corresponding penetrating holes in a penetrating mode correspondingly andcan be locked with the counter-force frame body through locking pieces correspondingly. The counter-force application angle can be adjusted at will, and the device can be suitable for load tests of structural planes with any i