A bidirectional alternate scanning-based multi-service satellite wireless resource adjusting method of the present invention comprises the following steps of 1) initializing a plurality of global variables; 2) calling a to-be-adjusted resource scanning sub-process to obtain a to-be-adjusted resource position po; 3) calling a to-be-adjusted resource new adjustment position scanning sub-process to obtain a to-be-adjusted resource adjustment position pd that is not distributed to use; 4) determining whether a wireless resource adjusting process stop condition is satisfied, if yes, ending a wireless resource adjusting process; if not, adjusting the to-be-adjusted resources at the position po to the undistributed resource adjustment position pd, and turning to the step 2) to continuously execute the subsequent resource adjusting processes, so that the undistributed wireless resources are distributed continuously as much as possible, the distribution processing pressure of a communication request processing module is reduced, the dynamic adjustment of the different types of wireless resource share is realized, the utilization efficiency of wireless resources of a satellite communication system is improved, and the capacity usage maximization is realized.