Building construction method and device for temporarily supporting mobile split heads

The invention provides a building construction method and device for temporarily supporting mobile split heads. The construction method comprises the following steps: constructing a template support system, binding floor slab rebars, arranging the mobile split heads, pouring concrete, pulling out the mobile split heads, trowelling the floor slab concrete for the first time, washing the mobile split heads and trowelling the floor slab concrete for the second time. The construction method and the construction device are used for stably and reliably protecting the bound rebar frameworks, are suitable for construction of horizontal members of various cast-in-situ double-layer rebar floor slabs and canopies and can effectively prevent upper rebars from sinking and bending and ensure the construction quality; the construction method is advanced and practicable and is simple to operate; the split heads can be dismantled and reused, thus further saving the cost and accelerating the construction progress under the premise of satisfying the use functions; under the premise of satisfying the requirements of use functions, the effects of saving energy and reducing consumption are achieved, the construction operation is simplified and the split heads can be produced in fixed shapes in series; therefore the construction device and the construction method have stronger applicability and economical efficiency and are respectively a new product and a new technology with stronger popularization and utilization values.