The invention provides a mobile device based on a trustable embedded platform and a safe storage method thereof. The mobile device comprises an embedded platform, an encrypt/decrypt chip and a TPM module, wherein, the embedded platform, the TPM module and the encrypt/decrypt chip are connected with a high speed bus. In the device and the storage method, according to the characteristics of an embedded system, the embedded platform, the TPM trustable platform module and the hardware encrypt/decrypt chip together are combined, thereby effectively solving the problem of key safe storage, breakingthrough bottleneck of transmission speed of an embedded system and an encryption engine, and ensuring a reliable environment for encrypt/decrypt operation.