OpenGL ES 3.0 use texture function，but the sample color is incorrect. Anyone can help me?

If I understand your original post correctly, this works:

void main() {
  vImgColor = texture(vFragTxrImageOES, vFragTexcoord0);
}

,,, but this doesn't?

void main() {
  vImgColor = texture(vFragTxrImageOES, vFragTexcoord0);
  vec3 scale = vec3((lutSize - 1.0) / lutSize);
  vec3 offset = vec3(1.0 / (2.0 * lutSize));
  vec3 apply = texture(3DTexture, scale * vImgColor.rgb + offset).rgb;
  FragColor = vImgColor;
}

If this is the case it looks like a possible bug in the Adreno shader compiler and/or hardware - dead code shouldn't impact the output.

HTH,
Pete

The effect is as fllows,  the left is normal, the right is abnormal.

Can you share the full shaders you are using please?

*EDIT* Also, can you let us know what device and Mali GPU you are using?

Cheers, 
Pete