The invention discloses an ATCA machine frame and a machine frame system; wherein, the ATCA machine frame comprises a plurality of exchanging veneers which are backups for each other, a clock distributing back inserting plate and an intermediate plate; every exchanging veneer comprises a main clock generator and a clock driver; wherein, the clock driver is connected at the back of the main clock generator, and synchronous clock signals generated by the main clock generator are output to the intermediate plate after going through the clock driver, and every exchanging veneer has timesharing of the clock distributing back inserting plate with other exchanging veneers which are backups for each other through the clock driver in the exchanging veneer, and at the same moment, synchronous clock signals output by only one of the exchanging veneers go into the clock distributing back inserting plate through the intermediate plate which is used for connecting and outputting the synchronous clock signals output by the exchanging veneers to the clock distributing back inserting plate. The invention can lead the neighboring exchanging veneers to share the clock distributing back inserting plate and clock distributing cables and so has the advantages of less cost and less resource consumption.