The Yixian maifanlite (YMS), a biotite-quartz monzouite, is a newly found mineral resource for food industry. It possesses the following characteristics: (1) existence of varied trace elements which are beneficial to human health; (2) fairly good functions of leaching, ion absorption and exchange, adjusting of pH and hardness of water and bacteria-inhibition; (3) Unique role in medical treatment and health care. It has thus been widely used in such aspects as medicine and health care, food and beverage, and environment protection. For the first time the author has noticed that a large quantity of zeolite occurs in cleavages, openings and cavities of feldspar, a dominant mineral of the rock. In addition, the author has also named the densely-distributed secondary cavities of the feldspar filled with specific porous zeolite and clay minerals as secondary microspongy texture, which, on the basis of its secondary mineral composition, shapes and sizes of mineral aggregates and its modes of occurrence, can be further divided into bladed, veinlike, spotted, ringlike and pockety types. The author holds that the secondary microspongy texture isa distinctive character of maifanlite, by which maifanlite is distinguished from common intermediateacidity igneous rocks. This texture might be a major factor responsible for the beneficial physicochemical effects of maifanlite as well as its medicohealth care function. It can also be taken as an important geological diseriminant criterion of maifanlite.