XML (extensive markup language) configuration file security protection processing method and system

The invention discloses an XML (extensive markup language) configuration file security protection processing method. The method includes: firstly initializing a second encryption key P and a third encryption key K; secondly, compressing and converting an XML file into a compressed-format file to form a firstly encrypted file; thirdly, using the second encryption key P for encrypting the firstly encrypted file again to form a secondly encrypted file and reading the secondly encrypted file in a memory; fourthly, embedding the secondly encrypted file with the third encryption key K through an encryption algorithm to form a thirdly encrypted file and reading the thirdly encrypted file into the memory; fifthly, utilizing the third encryption key K to convert the thirdly encrypted file of the compressed format into a thirdly decrypted file through a decryption algorithm and performing second decryption; finally, decrypting the secondly decrypted file with a compression and conversion password to form an XML file. The three-level encryption and decryption method is adopted, and all the levels of encryption are different in form and method, so that difficulty in decryption is heightened, and data security is enhanced greatly.