[2][3] Shixingoolithus eggs are nearly spherical, and about 12 cm in diameter, with a shell thickness of 2.3–2.6 mm.

The shell is made up of tall, prismatic units, and has narrow, irregular pore canals.

[7][8] Shixingoolithus was initially described as a member of the Spheroolithidae on the basis of its spherical shape, and similarities to other spheroolithid eggs.

[7][3] In 2012, Wang et al. classified Shixingoolithus in a new oofamily, Stalicoolithidae, alongside Stalicoolithus and Coralloidoolithus, because of the secondary eggshell units found in its pore canals.

It has also been speculated to in fact be a dendroolithid, but a more complete description must be made before its classification can be resolved.