The invention discloses a mobile terminal video stream stealth transmission method based on the Android platform. The method comprises the following steps: scrambling a confidential letter to be hidden to obtain a chaotic confidential letter sequence; selecting an image block with complex vein, large movement component and suitable for information hiding as a to-be-embedded carrier; extracting confidential letter bits from the chaotic confidential letter sequence in groups, performing xor operation on 4 intermediate frequency coefficients in all image block DCT quantization coefficients with marks and sizes of 8*8 pixels to form video compressed encoding stream containing stealth; and restoring the confidential letter from the video compressed encoding stream by a receiver by using a negotiation key. Execution efficiency of the method is considered while ensuring the security, the stealth effect is good, the flexibility is high, and the stealth communication demands of the mobile terminal are satisfied.