and I has checked back to source of data, I found is
A data is \ , Normally, KNIME should be show data is \ in this spitted column, right? or
I has change the setting to check \ is especially character after this column is not spitted.
so How should I do to fix this issue and prevent it ? ( I should have not data backslash \ right ?)
This is because you have set a quotation character. If set then the sentences between quotes are preserved which means that the delimiteris ignored between the quotation characters when deciding where to split your sentences.
I would recommend to “leave empty for none” the field where you have set a " character and see whether this solves your issue.