The invention discloses an Android third party push enhancement method and system, and a related device. The method comprises the following steps: realizing message encryption and signature authentication by using asymmetric encryption; signing and encrypting a message during message transmission, and transmitting the message through HTTPS; receiving the message by a client, decrypting and verifying the message, and meanwhile detecting the repeatability of the message in a character string matching mode, therefore the performance overhead is smaller; and on the respect of client key management, an asymmetric encryption key is stored in a private memory SharedPreferences through symmetric encryption by realizing encryption and decryption logic via a so library. The method provided by the invention has relatively high security, can resist against general message forgery, message leakage, message replay attack and untrusted third party push problems.