The invention relates to a method for realizing a two-layer tunnel protocol network server load balancing, which is used for CDMA1x network. The method comprises the steps as follows: step 1, an attestation, authentication and accounting server receives a visit request information about virtual private dial network application, then the visit request information is transmitted to a virtual private dial network management system; step 2, the virtual private dial network management system selects a current usable two-layer tunnel protocol network server according to the current load of all two-layer tunnel protocol network servers; a responses information which comprises the address of the two-layer tunnel protocol network server is sent to the attestation, authentication and accounting server; step 3, the attestation, authentication and accounting server sends a visit accepting information which comprises the address of the two-layer tunnel protocol network server to a grouping data service node. The invention is capable of selecting the most disengaged LNS according to the achieved performance parameter of the LNS, so the load balancing is more effective.