  Superconducting topological metals (SCTMs) have recently emerged as a
promising platform of topological superconductivity (TSC) and Majorana zero
modes(MZMs) for quantum computation. Despite their importance in both
fundamental research and applications, SCTMs are very rare in nature. In
addition, some superconductors with topological electronic structures have been
reported recently, but a feasible program to determine their TSC properties is
still lacking. Here, we propose a new strategy to design SCTMs by intercalating
the superconducting units into the topological insulators. A program that
characterizes the superconducting BdG Chern number of 2D BdG Hamiltonian from
ab initio calculations is also developed. Following this strategy,
PdBi$_2$Te$_5$ and PdBi$_2$Te$_4$ are found to be experimentally synthesizable
and ideal SCTMs. Chiral TSC could be realized in such SCTMs by incorporating
topological surface states with Zeeman effect, which can be realized by an
external magnetic field or in proximity to ferromagnetic (FM) insulator. Our
strategy provides a new method for identifying the SCTMs and TSC candidates,
and the program makes it possible to design and modulate the TSC candidates
from ab initio calculations.
