Civil engineering building construction support

The utility model belongs to the technical field of civil engineering, and particularly relates to a civil engineering building construction support which comprises four first supporting columns of a hollow structure, the four first supporting columns are symmetrically distributed in the front-back direction and the left-right direction, and shells are fixedly arranged at the bottoms of the adjacent end faces of the four first supporting columns. When the device is used, the device is firstly placed at a working place, then when a worker needs to climb on the supporting platform, a first motor is firstly powered on, a main shaft of the first motor drives a first gear to rotate, then a second gear is driven to rotate, the second gear rotates to drive rotating wheels to rotate, and through arrangement of a belt, the four rotating wheels rotate; at the moment, the lead screw rotates to drive the sliding block to do linear motion on the lead screw in the vertical direction, at the moment, the sliding block drives