The present invention discloses a method for transmitting path loss power threshold configuration information and a network side device. The method includes: the network side increasing or reducing the weighted sum value currently selected by the cell according to the scenario of resources which can be allocated in a current cell, updating the random access preamble group B power offset value and the power offset value between the random access preamble and the first scheduled transmission (Msg3) sent over the uplink channel resources respectively according to the increased or reduced weighted sum value, sending the updated random access preamble group B power offset value and the updated power offset value between the random access preamble and Msg3 to a terminal of the cell.