A server rail and server rack mounting structure includes a server rail, a server rack having a plurality of locating holes, a mounting bracket located at one end of an outer rail portion of the server rail and having a plurality of mounting rods respectively plugged into respective locating holes of the server rack and an abutment wall neighbored to the mounting rods, a swivel control member comprising a stop wall, a pivot member pivotally connect one end of the swivel control member to the mounting bracket and a torsion spring mounted around the pivot member and stopped between the mounting bracket and the swivel control member.