Molecular phylogenetic analysis of ribosomal DNA sequences shows that the species groups in a clade with Tuber huidongense.

The specific epithet sinoalbidum combines the Latin words for China (sino) and white (albidum).

[1] The fruit bodies of Tuber sinoalbidum are whitish in color, spherical or nearly so, and measure 2–4.5 cm (0.8–1.8 in) in diameter.

The inner layer (150–200 μm thick) is a type of tissue known as a textura intricata, consisting of irregularly interwoven hyphae.

[1] The authors note that Tuber huidongense (endemic to Sichuan and Yunnan Provinces) resembles Tuber sinoalbidum in spore ornamentation, but the former species can be distinguished from the latter by the brown surface color and blackish gleba of mature fruit bodies.