The invention provides a method for realizing a host computer multi-data fusion interface of a virtual time reversal passive direction finder. According to the method, a host computer is connected with an array element receiver, a clock source board and a sampling clock board through a CAN port; a working condition of the array element receiver is determined according to a feedback state; the hostcomputer selects an A/D collection duration and sends a collection instruction to an i7 control computer through a network line so as to start A/D collection; whether the host computer receives an instruction that a remote control and remote sensing terminal recalls A/D collection data is determined; a digital down conversion frequency required by target frequency down conversion is calculated; adown conversion data table is selected according to the frequency, and an instruction is sent to enable the i7 control computer to transmit the down conversion data table to DDR3 of an FPGA through aPCIE high-speed data channel; a corresponding delay compensation table is selected and transmitted to the DDR3 of the FPGA; the host computer sends a command of starting a direction finding operation; and the host computer delivers direction finding data read from the DDR3 to a radar display screen module, and a direction finding result is displayed in real time after data processing. Through adoption of the method, an antenna array signal can be debugged and observed in a long distance, and a constructed virtual time reversal passive direction finder is more practical and advanced in engineering use.