System and method for document security transmission

The invention discloses a system and a method for document security transmission, which relate to the technical field of network security, wherein the system comprises a client side, a forwarding terminal and a server which are sequentially connected with one another; the client side is used for sending the connection request and document forwarding request to the forwarding terminal; the forwarding terminal is used for forwarding the received connection request and document forwarding request to the server side; and the server side is used for receiving the connection request and document forwarding request, establishing the connection with the client side, and realizing document transmission through the established connection. Through arranging the forwarding terminal, the client side and the server side are isolated from one another, a receiving server in the server side is prevented from being exposed in a public network, so the document transmission security is improved.