I would like to ask one question:
when we design pseudo differential amplifier, the common mode feedback circuit also should pseudo differential (without tail current source) or not ?

thank you very much

Pseudo-differential means two single-ended stages used with complementary signals. Typical no common-mode rejection but if the signals are used as differential cancelation of some negative effects could occur.

No commom mode control needed. If the single-ended stages make a level shift between in and out and you can control that this will be a common mode control.