An embodiment of the present invention discloses an interrupt response method, an apparatus, and a base station. The method can be applied to a base station whose CPU is provided with an MMU and at least two registers, each of the registers containing an interrupt number and a process number. The method comprises: interrupting a target process running under a user mode when receiving an interrupt request carrying the interrupt number, and storing context information of the target process; acquiring the process number of the target process; judging whether there is a target register in which the process number of the target process and the interrupt number are stored among the at least two registers; if there is a register in which the process number of the target process and the interrupt number are stored, then executing an interrupt handler corresponding to the interrupt number under the user mode; and when the execution of the interrupt handler is complete, continuing running the target process according t
