  We describe a method to determine the anomaly polynomials of general 6d
$\mathcal{N}=(2,0)$ and $\mathcal{N}=(1,0)$ SCFTs, in terms of the anomaly
matching on their tensor branches. This method is almost purely field
theoretical, and can be applied to all known 6d SCFTs. We demonstrate our
method in many concrete examples, including $\mathcal{N}=(2,0)$ theories of
arbitrary type and the theories on M5 branes on ALE singularities, reproducing
the $N^3$ behavior. We check the results against the anomaly polynomials
computed M-theoretically via the anomaly inflow.
