Installation method of pit filter

The invention discloses a pit filter mounting method, and particularly relates to the technical field of nuclear facility ventilation. The installation method comprises the steps that the installation position of the pit filter is determined, a permanent hole is reserved in the installation position, meanwhile, a secondary pouring area is reserved on the periphery of the permanent hole, and an upper structural plate and a lower structural plate or a foundation are arranged; the support is welded to the lower structural plate or the foundation in the permanent hole; a shielding cover plate and a filter element are installed at the hole opening of the permanent hole, and the shielding cover plate is fixedly connected with the support; and pouring cement mortar into the secondary pouring area to form a connecting layer for connecting the shielding cover plate and the upper structural plate. The installation method of the pit filter for nuclear facility ventilation is improved, the problems that equipment cannot