HG series manual concrete placing boom of 12m, 15m and 18m, is a new product of our company produced for enlarging the range of concrete pouring and increasing the mechanization level of pumping operation. It connects to concrete delivery pump as corollary equipment, which enlarges the pumping range of concrete, effectively solves the hard problem of material distributing in wall pouring, and plays an important role in improving operating efficiency and reducing labor intensity. This distributing boom is reasonably designed, with stable and reliable structure, and its all direction and boom-type distributing structure makes it possible for the whole machine to be easy to operate manually and flexibly turned. The crane body is of appropriate height; and distributing direction can be easily changed by just pulling the rope, featuring character of high efficiency and energy saving, as well as being economical and practical, etc.