I felt this sentence that uses participial construction is unnatural but I don't know why.
She visiting my house, I was studying English.
Is that because of the verb, visit? I'm non-native speaker.
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If you use the present progressive tense, the "to be" verb is required.
She was visiting my house.
As written these two actions are disconnected. If you want to connect them in some way you need to relate them to each other, for example:
She was visiting my house while I was studying English.
She was visiting my house after I finished studying English.
She came to visit me as I was studying English.
And so on.