The Anti-federalists fear that the new US Constitutional would result in a tyrannical federal (aka central government).
The Anti-federalists were concerned about the power of the federal government due to their experience as British subjects. One of the main reasons why the United States broke away from Britain was due to the powerful central government that implemented taxes without the consent of the colonists throughout the 1760's and 1770's.
The Anti-federalists feared that the new US Constitution gave the federal government too much power and did not give enough power to the state governments and people.
