Protective support for constructional engineering

The utility model provides a protective support for constructional engineering, which relates to the technical field of protective supports and comprises a support frame, a slide rail is fixedly mounted on the side surface of the support frame, a protective plate is slidably connected to the surface of the slide rail, a spring is fixedly mounted at the lower end of the support frame, and a fixing pile is fixedly connected to the lower end of the spring. When people need to install the protective support, the movable plates between the rectangular blocks are rotated firstly, the fixing holes and the inserting rods move along with the movable plates at the same time, when the fixing holes and the sliding rods are completely separated, the fixing piles move to the outer side of the supporting frame under the action of spring stress, and the sliding rods are fixed to the outer side of the supporting frame; people insert the fixing piles into holes in the ground, then the movable plate and the ground are fixed thr