The utility model discloses a mobile communication basic station outdoor cabinet is assembled to modularization section bar, the on -line screen storage device comprises a base, the upper end both sides of base all are equipped with first recess, fixedly connected with fixed block in the first recess, the upper end of base is equipped with two parallel arrangement's starting stave, the lower extreme of starting stave is located first recess, and the lower extreme of starting stave is equipped with slots with the fixed block assorted, be equipped with a plurality of through -holes on the lateral wall of first recess, be equipped with first bolt in the through -hole, first bolt runs through starting stave and fixed block setting, all be equipped with the second recess on the lateral wall that two starting staves were carried on the back mutually, second recess internal rotation is connected with the backup pad, the backup pad is near fixedly connected with connecting block on the lateralwall of second recess, the one end rotation that the backup pad was kept away from to the connecting block is connected with first dwang, the first slider of one end fixedly connected with of connecting block is kept away from to first dwang. The utility model discloses convenient transportation, the installation of being convenient for, and have better leakproofness.