The present invention discloses a plastic case type optical divider installation module, and relates to the electric power communication technology field. The plastic case type optical divider installation module comprises an inserting piece unit, a sliding block and a connector, the sliding block and the inserting piece unit are in slip connection and then are fixed, the inserting piece unit and a target fixing position are plugged and fixed via the connector, and the materials of the inserting piece unit, the sliding block and the connector are plastics. By adopting a structural design technology which is convenient for compatibility and expansion, the same one plastic case type optical divider installation module satisfies the installation and fixing of the case type optical dividers of different manufactures and different appearance sizes, is rapid and simple to install and simple to process, is small in occupied space and low in cost, is suitable for the batch production, and does not need the installing screws, namely, can realize the rapid installation, fixing and expansion.