The invention discloses a support for an civil engineering measuring instrument, and mainly relates to the field of civil engineering. The support comprises a support table, wherein a spherical base of a detector is fixed on the support table, an upper support is annularly arrayed on the periphery of the support table, a rotating arm is hinged to the upper support, a working plate is fixed on theouter side end face of the rotating arm, a spring data clamp is arranged on the working plate, a supporting rod is hinged to the outer end of the rotating arm, one end, far away from the rotating arm,of the supporting rod is locked on the upper support in an adjustable height mode, a data box is detachably arranged on the upper support, the data box is a flat box body, the top surface of the databox is a flat end surface and is provided with a box opening, the inner side surface of the data box is detachably fixed with the upper support, and the outer side surface of the data box is providedwith a slot matched with a working plate in an inserting mode. The support has the beneficial effects and advantages of stable support, convenience in recording, and small and portability due to folding.