The utility model discloses a secure communication gateway based on developments are encrypted at random relates to industry internet communication field, include timer, random number generator, communication module, key generation ware and add decryption module. The timer is connected with random number generator, communication module and key generation ware respectively, sends pulse signal in the settlement cycle when reacing, random number generator and communication module are connected, generate the random number and send out, communication module is connected with the key generation ware, sends the random number at communication both ends, the key generation ware with be connected with decryption module. The utility model discloses a timer that sets up, the periodic update key to guarantee industry internet communication safety and need not to exchange under the condition of key between the messenger secure communication gateway, realizes encrypted communication, thereby has effectively reduced the potential safety hazard that network transmission key in -process brought, need not artifical configuration management and generate the key, the key of effectively having avoided the human factor to bring leaks hidden danger.