i have truvision home theater i am unable to connect home theater with my lg smart tv give solution

Without model numbers we can't give you an exact answer.
The most common TV audio output is digital optical. The HTS has an analog aux input. You will need a converter like this one.
Check the TV manual on how to use the optical output. You may have to turn it on, turn the TV speakers off, and change the audio output type in the TV menu.