${\mathrm{CeRh}}_2{\mathrm{As}}_2$ is a newly discovered candidate of multiphase heavy-fermion superconductor $(T_{\mathrm{c}}\approx 0.3 \mathrm{K})$ with intriguing physical properties. Here, we employ soft point-contact spectroscopy to investigate its energy gap behaviors in both the normal and superconducting states. The differential conductance below $T_{\mathrm{c}}$ reveals an estimated superconducting energy gap of $2{\mathrm{\Delta }}_{\mathrm{SC}}\approx 0.24$ meV and thus an extremely strong superconducting pairing strength $2{\mathrm{\Delta }}_{\mathrm{SC}}/k_{\mathrm{B}}{T}_{\mathrm{c}}\approx 8.8$, which is comparable to those of cuprates and iron-based high-$T_{\mathrm{c}}$ superconductors as well as infinite-layer nickelates. Above $T_{\mathrm{c}}$, a well-defined pseudogap feature is manifested as a V-shaped dip in the differential conductance spanning an energy scale of $2{\mathrm{\Delta }}_{\mathrm{g}}\approx 0.95-3.0$ meV. The pseudogap feature persists to the highest characteristic temperature of $T_{\mathrm{g}}\approx 8-9$ K and is gradually suppressed by magnetic field of $B_{\mathrm{g}}\approx 9.0\pm 0.5$ T regardless of its direction relative to the crystallographic axes. The observation of pseudogap features prior to the superconducting phase transition enriches the phase diagram of ${\mathrm{CeRh}}_2{\mathrm{As}}_2$ and provides a platform to study the interplay of unconventional superconductivity and pseudogap phenomena.

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• Pseudogap
• Spin-triplet pairing
• Heavy-fermion systems
• Unconventional superconductors
• Andreev point contact spectroscopy
• Resistivity measurements