Construction support convenient to operate and use and operation method thereof

The invention discloses a construction support convenient to operate and use and an operation method thereof, and relates to the technical field of construction supports, the construction support comprises a bottom plate, a plurality of lifting plates are arranged above the top surface of the bottom plate, and a fixing plate is arranged above each lifting plate; a sleeve is arranged at the corner of the top face of each lifting plate, a sliding barrel is inserted into each sleeve, and a sliding rod is inserted into a top end opening in each sliding barrel. A pair of first U-shaped supports is arranged on each of the two sides of the top face of the bottom plate and the two sides of the top face of the fixing plate, a first hinge rod is arranged in an opening of each first U-shaped support, a pair of second U-shaped supports is arranged on each of the two sides of the bottom face of each lifting plate, and a second hinge rod is arranged in an opening of each second U-shaped support. The bottom end of each seco