diff --git a/be/src/vec/exec/format/csv/csv_reader.cpp b/be/src/vec/exec/format/csv/csv_reader.cpp
index 9da29ed6dc10ac..09531a2c2b9759 100644
--- a/be/src/vec/exec/format/csv/csv_reader.cpp
+++ b/be/src/vec/exec/format/csv/csv_reader.cpp
@@ -82,7 +82,7 @@ CsvReader::CsvReader(RuntimeState* state, RuntimeProfile* profile, ScannerCounte
           _file_reader(nullptr),
           _line_reader(nullptr),
           _line_reader_eof(false),
-          _text_converter(nullptr),
+          _text_converter(new(std::nothrow) TextConverter('\\')),
           _decompressor(nullptr),
           _skip_lines(0),
           _io_ctx(io_ctx) {
@@ -91,7 +91,6 @@ CsvReader::CsvReader(RuntimeState* state, RuntimeProfile* profile, ScannerCounte
     _file_compress_type = _params.compress_type;
     _size = _range.size;
 
-    _text_converter.reset(new (std::nothrow) TextConverter('\\', _array_delimiter[0]));
     _split_values.reserve(sizeof(Slice) * _file_slot_descs.size());
     _init_system_properties();
     _init_file_description();
@@ -107,7 +106,7 @@ CsvReader::CsvReader(RuntimeProfile* profile, const TFileScanRangeParams& params
           _file_slot_descs(file_slot_descs),
           _line_reader(nullptr),
           _line_reader_eof(false),
-          _text_converter(nullptr),
+          _text_converter(new(std::nothrow) TextConverter('\\')),
           _decompressor(nullptr),
           _io_ctx(io_ctx) {
     _file_format_type = _params.format_type;