Dear @Jummy,
Welcome to the Wefugees Community and thank you for reaching out to us.
I am afraid that we can not provide any tailored information based on the little information you share. Family reunification rules depend on various factors. The easiest would be if your partner is an EU-citizen since he would be allowed to move freely within the EU. In case he is a third country national, it is slightly more complicated as he needs to apply for a visa (it is not that you can apply for a residence permit for him here). For this, the following questions will be relevant: Are you two married? If yes, did you marry before or after you left your country of origin? Did he officially recognise the paternity/do you share the custody for the children? Which residence permit are you/the children holding? Which status does he have in Malta?
For general information on this topic, you may also check Handbook Germany.
In any case, please also don't hesitate to get back to us with more details on your situation (of course no personal information/data) or with any further questions.
All the best,
Meike