l1           900    902    912     913    916
l2           ИП ПС  ИП ПС  ИП  ПС  ИП ПС  ИП ПС
i1    i2
x1    Total  10  6   3  3  10  16   2  9   3  8
x2    Total   1  0   0  0   0   0   0  0   0  0

index = df.index
names = index.names
index = df.index.tolist()[:1]+[('x2','x2')]
df.index = pd.MultiIndex.from_tuples(index, names = names)

df.index.set_levels([u'Total', u'x2'],level=1,inplace=True)
df.index.set_labels([0, 1],level=1,inplace=True)