Outgoing document encryption protection method

The invention discloses an outgoing document encryption protection method. The method comprises the following steps: (1) generating a CFP document in a local computer, packaging the CFP document into an outgoing shell program, wherein the shell program comprises a CFP document and a CFP browser; step (2) transmitting the packaged outgoing shell program to a receiving computer; (3) directly clicking the outgoing shell program for two times on the receiving computer, directly starting the CFP browser by virtue of the outgoing shell program, starting a sand box environment by virtue of the CFP browser when a document browsing button is clicked by the user, and releasing the CFP document to a specific directory under the sand box environment; further starting an external application program process on the computer by virtue of the CFP browser according to a CFP document format, opening the document in the sand box environment, and configuring the access permission of the CFP document as follows: the document in the specific directory can only be accessed in the sand box environment.