A call drop rate reduction method, applied to a terminal, wherein the method comprises: receiving a first identity verification request sent by a base station, wherein the first identity verification request is initiated by a core network, and a T3360 timer is started by the core network after the core network sends the first identity verification request to the base station; sending, through the base station in response to the first identity verification request, a first identity verification response that is for the first identity verification request and that indicates verification success to the core network; receiving a second identity verification request sent by the base station, wherein the second identity verification request is initiated by the core network after a timing duration corresponding to the T3360 timer expires; determining whether the first identity verification request is the same as the second identity verification request; when the first identity verification request is the same as the second identity verification request, sending, through the base station in response to the second identity verification request, a second identity verification response that is for the second identity verification request and that indicates verification failure to the core network, and starting a T3320 timer; obtaining direction information of a currently executed call service within a timing duration corresponding to the T3320 timer, wherein the call service is associated with the first identity verification request and the second identity verification request; determining, according to the direction information, whether the call service is redirected to success; and stopping the T3320 timer when the call service is redirected to success. receiving a first identity verification request sent by a base station, wherein the first identity verification request is initiated by a core network, and a T3360 timer is started by the core network after the core network sends the first identity verification request to the base station; sending, through the base station in response to the first identity verification request, a first identity verification response that is for the first identity verification request and that indicates verification success to the core network; receiving a second identity verification request sent by the base station, wherein the second identity verification request is initiated by the core network after a timing duration corresponding to the T3360 timer expires; determining whether the first identity verification request is the same as the second identity verification request; when the first identity verification request is the same as the second identity verification request, sending, through the base station in response to the second identity verification request, a second identity verification response that is for the second identity verification request and that indicates verification failure to the core network, and starting a T3320 timer; obtaining direction information of a currently executed call service within a timing duration corresponding to the T3320 timer, wherein the call service is associated with the first identity verification request and the second identity verification request; determining, according to the direction information, whether the call service is redirected to success; and stopping the T3320 timer when the call service is redirected to success.