A channel loading pre-adjusting system for 5G wireless communication adapted to be used for communicating at least one user's device with a core network includes a radio unit, a distributed unit in communication with the radio unit via a specified transmission channel, and a central unit. The distributed unit periodically detects transmission conditions of the specified channel and determines whether to issue an alarm signal accordingly, and in response to the alarm signal, the central unit determines whether to suspend data transmission via the specified transmission channel. The transmission conditions include a first group of latency parameters realized in a first number of consecutive detecting operations of the distributed unit and a temporal threshold derived from a second group of latency parameters realized in a second number of consecutive detecting operations of the distributed unit, and the first group of latency parameters are dynamically updated with time.