An assemble and disassemble structure for container liner and liner locking device thereof, which provides a drinking container having a mineral liner that can be replaced through the assemble and disassemble structure. The assembly is provided with an outer cylindrical sleeve, the interior of which is a holding space. The outer circumference of the upper end of the outer cylindrical sleeve is a connecting end, and the mineral liner is inserted into the outer cylindrical sleeve. A connecting ring is provided with a clasping portion, and assembling the clasping portion to the outer cylindrical sleeve enables fixing the mineral liner in a stable position in the outer cylindrical sleeve. An elastic locking device locks the connecting ring at combining angular positions.