The invention provides a security control device for a carrier rocket. The security control device comprises a receiving and processing module and an execution unit which are integrated. The receiving and processing module comprises a receiving channel unit, an A/D converter and an FPGA digital platform, wherein the FPGA digital platform demodulates security control signals after AD conversion by respectively using a DPSK-FM algorithm and an MHA/FM algorithm, and then carries out decoding on the demodulated security control signals; security control signals fed back by the execution unit from a control system are received; an execution instruction is outputted to the execution unit according to the decoded security signals and the security control signals fed back by the execution unit; the execution unit receives the security control signals from the control system, and feeds back the received security control signals to the FPGA digital platform; and an initiator is driven to operate according to the execution instruction.