What do you need to influence a rigid boss' conviction in a private organization?

What means "rigid boss", a boss who do not understand your advice or job contribution and refuse your ideas... then I would say, pls be patient, listen carefully why the boss makes him/her self rigid (are there business motives which you are not aware off) and try again with clear communication by exchange of information instead of personal grievances.

i should successfully communicate with him the importance of trust relation with the employees by showing the benefits of delegations and empowerment which will bubble innovation 

You should make sure that your strategy will implement can bring benefits for organization, such as revenue growth, decrease on operation costs (expenses), short cut procedure, realistic planning which will impact on performance organization.

These7 Points may be of help.

1. Try and  burry your ego

2.  Respect your boss and his/her opinnion

3. Always have it in your mind that frustration will not take you out but better offer.

4.  Make the company policies your daily bible

5.  Do not expect thank you at all.

6.  Don't stop at doing your work deligently, go extra mile.

7.  Be prayerful ....Tip (Lord grant unto me favour before my boss and beautify my undertakings always)

You need to change "yours" to adopte this steps:

1. Adapt to them. They won’t adapt to you. 
2. Admire their strengths and say so. Say, “Your personal consistency brings stability and consistency to our organization.”
3. Accept, embrace, and answer their discomforts or fears. You’re crazy if you tell them it will be ok or things will work out.
4. Give them time to mull things over. Don’t spring stuff on them.
5. Avoid adding stress to their stressful lives.
6. Say at least three positives for one negative "Employ the 3 to 1 rule".
7. Be on their team. Help them succeed.

I do not need my trust in God, myself, my practical abilities, and the existence of a system that works in the spirit of one team for its مااحتاج ثقتي بالله وبنفسي وقدراتي العمليه ووجود نظام يعمل الكل به بروح الفريق الواحد لمصلحته I do not need my trust in God, myself, my practical abilities, and the existence of a system that works in the spirit of one team for its own organized interest

Speed ​​of intuition, mastery of work, and interest in work

Showing him a good example of private organization.

Logical persuading, legitimizing, exchanging, stating, socializing, appealing to relationship, consulting, alliance building, appealing to values, and modeling.

Better communication and solid reasons to convice him