angular项目的根目录有个.editorconfig文件打开它，差不多如下

# Editor configuration, see https://editorconfig.org
root = true

[*]
charset = utf-8
indent_style = space
indent_size = 2   // 修改这里
insert_final_newline = true
trim_trailing_whitespace = true

[*.ts]
quote_type = single

[*.md]
max_line_length = off
trim_trailing_whitespace = false

然后修改indent_size后面的数字就可以了