Warm welcome to the forum. Help us help you by updating your profile to include your state (or the equivalent if you live outside the US).
It appears that you are growing your pear tree in a container. A container that is MUCH too small. If you want to container grow fruit trees - even miniatures - you need at LEAST a 24" diameter pot. Preferably a 15 to 25 gallon nursery pot.
Are the rest of your plants also in containers?
What soil did you use? How long have they been planted? What are your watering and feeding practices? What are the growing conditions - sun and shade? What varieties did you plant?