I usually use gplot. In this case I'd try the following axis definition:

Axis logbase=10 order=(4 40 400).

Proc gplot .... ;
Plot .... / yaxis =axis1;
Run;

sgplot中yaxis可以用type=log等选项，但是纵坐标仍然是10 50 100

Thanks for your suggestion.

Actually, there is no 4*10E(0 1 2 3). SAS support logbase=10 just as (1 10 100 1000).

I try to use max=1000 in yaxis while it works.

Now here is another problem .

A graph has more than eighty group.I plot such many series but there if no space to export so many legends. Which option can solve this problem ?