Abstract: The paper presents a structure of circuit, which can configure and reconfigure FPGA with bitstream data when powers on, on the basis of the Salve SelectMAP mode of Xilinx Virtex FPGA. Moreover, VHDL is used to depict the hardware of design. The circuit can configure not more than 4 paths Virtex FPGA with the configuration file in Slave SelectMAP mode. At the same time, it's compatible with various types of flash to save bitstream data. Users can choose any type of memory to match with one or more paths FPGA flexibly, to fulfill their requirements. Adopting the 0.18um technology of SMIC to tapeout. According to the results of test, the circuit is characterized by simple structure, stable performance, good generality, and it can meet the requirements of space circuits system and be embed in the satellite load circuits.