Post-cast strip side face sealing device and method

The invention provides a post-cast strip side face sealing device and method, relates to the field of pouring formworks, and aims to solve the problems that an existing sealing structure of a post-cast strip area is inconvenient to arrange and poor in stability, a formwork with an inverted L-shaped end face is adopted to abut against the side face of a post-cast strip, and a containing groove with one open end is formed in a plugging plate of the formwork to contain steel bars. Therefore, arrangement can be carried out after binding, during binding or before binding of the reinforcing steel bars is completed, installation can be carried out in the vertical direction perpendicular to the axes of the reinforcing steel bars, the convenience of arrangement and disassembly is improved, the supporting plates of the formworks can be connected with the supporting pieces, relative support is established between the oppositely-arranged formworks in the same post-cast strip, the supporting stability is improved, and the