最高学历英语怎么说

以下都可以：
Highest Academic Qualification
Degree Held
Highest Degree
Highest Education

如果一定强调是学历，就用Highest Academic Qualification老外这样用

terminal degree

Highest degree。deploma不太确切，而且highest也不可省略，至少简历上应该这么写。

Highest Diploma / Degree Obtained

获得的最高学历或学位

更多的时候 就直接用degree

highest academic achievement

the top diploma