The invention provides a multi-protocol conversion verification method and device for a data packet. The method comprises: a switching chip receiving a first data packet sent by a first verification device; extracting packet header information and packet content information of a source protocol from the analyzed first data packet; converting the packet header information of the source protocol into packet header information of a destination protocol in the second verification device; packaging the packet header information of the destination protocol and the packet content information of the source protocol to obtain a second data packet; sending the second data packet to a second verification device, so that the second verification device verifies the second data packet to generate a verification result. Double detection can be carried out on packet header information and packet content information of a data packet, and whether the data packet after protocol conversion is correct or not is detected more comprehensively, so that the verification efficiency and the verification credibility are improved.