As a Chadian national do I need a visa to travel to malawi or is it visa on arrival. As malawi has no diplomatic relationship with Chad .
Sorry, but as a Chadian passport holder, you must get visa before arrival in Malawi.
How you can do this I dont know. At one time you could get help from the British Consulate, as Malawi is a member of the Commonwealth, but this is "old" information, so dont know if it still applies.