The “fivestoreyed type” model of the veintype tungsten deposits in the Nanling Mountains, Southern China, has a normal sector texture on the lengthwise section, a branchlike texture on cross profile, and is distributed along along structural belts in oriented vein groups. With the increase of depth, the fractal dimension of the veins (averaging 1.10) in the Meiziwo tungsten Deposit, Shixing County, decreases gradually. Oriented and periodical earthquakepumping, hydrofracturing and rupturehealing occurred when the orebearing fluid from Yanshanian magma moved along the structural belts. . For the same ore vein, the breadth of the vein is determined by its dilation rate and time: the bigger the breadth is the much smaller its dilation rate is, and much longer dilation time is needed and and its starting time is much earlier; or vice versa. The study suggests that the dilation rate has close relation to the relative size between hydraulic pressure and confining pressure: if the hydraulic pressure is given, the larger the confining pressure is, the smaller the dilation rate, or vice versa. The differences of confining pressures and dilation rates here and there make the tectonic styles and the breadth obviously different from each other in the central section, the bottom section, the side section and the top section in the “fivestoreyed type”.Individual vein in the central section is characterized by continuous composite veins with stable breadth; individual veins in the lateral sections wedges out naturally, or its swithers pinching out either at one side or both sides; complicated treelike swithers appear at the top section with swithers pinching out naturally or composite between swithers pinching out by inches; while at the bottom section, the veins are likely to wedge out naturally.