谢谢您给的信息和帮助！
1. 配偶国内，无绿卡，从来没有来过美国， 也无税号。
本人绿卡。结婚第一年，第一次遇到美国报税问题。
-Your spouse needs to have a US tax ID (ITIN) if you want to include her in your tax return (i.e., file joint tax return).
2. 请问如何报税？married filed jointly? married filed seperately?
-See this IRS link:
Nonresident spouse | Internal Revenue Service
配偶没有美国的税号。
-You need to apply for an ITIN (Individual Taxpayer Identification Number) for her. If you just file married file separately, then your spouse does not have to have ITIN.
3. 配偶在国内的收入需要报税吗？
-Yes if you want to file joint tax return. If you just file the tax return for yourself, i.e., Married Filing Separately (MFS) , your spouse's income is not included in your tax return, and she does not need to file tax return to IRS either.
4. 选择married filed jointly, 本人的tax bracket要高？
-You need to calculate it by yourself and then, do comparison.
