To provide a working range regulation arrangement of a telescopic type boom type high-ground disassembly machine, which regulates an operation of each attachment according to each working state of high-ground working and low-ground working of a disassembly machine so that the working range can be stably defined.

A telescopic boom angle sensor 20 for detecting the angle of depression and incidence of a telescopic boom 15, a telescopic boom flexible length sensor 21 for detecting the flexible length of the telescopic boom 17, and a second boom angle sensor 22 for detecting the angle of depression and incidence of a second boom 16, are arranged. The working position of the disassembly machine is decided from the detection value of each sensor, the lowering angle of the telescopic boom 15 is regulated to the first determined angle A2 in high-ground working, the lowering angle of the telescopic boom 15 is regulated to the second determined angle B2 which is inclined above the first determined angle A2, and also an extension operation of the telescopic sensor 15 is stopped in middle-ground working, and the extension operation of the telescopic boom 15 is stopped and also an opening operation of the second boom 16 is stopped in lower-ground working.

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