The HDT series of truck-mounted concrete mixer mainly applies to long-distance mixing transport of concrete mixture,effectively delay concrete coagulation,avoids concrete stratification and eduction,and ensures construction quality and speed. HONGDA serial concrete mixer trucks include many models such as 8m³,9m³,10m³,12m³,14m³ and can choose any tailor-made-for-mixer-truck special chassis both at home and abroad as supporting part according to customers' choices. The stirring vat driving system adopts original imported AMERICA and GERMANY closed circuit hydraulic system pump,motor,and reductor, and supporting hydraulic parts such as oil tank, radiator,filter,hose connector all adopt imported parts in order to ensure hydraulic system with long using life. Stirring vat body and helical vanes all adopt B520JJ single-purpose special fine crystal particle hard wearing steel plate from SHANGHAI BAOGANG while the easy wearing positions having much contact with concrete such as feeding and discharge bucket chutes,etc. are also stuck with hard wearing steel plate, which correspondingly give the product rather long using life. Multiple mixing arms are set in stirring vat while square and round holes are scientifically arranged in mixing vanes, which both realize real three-dimensional mixing work of concrete with discharge surplus nearly achieving zero and with concrete eduction greatly avoided. Mobile discharge chute can be locked at 4 different positions to achieve discharge operation in different directions. The whole truck adopts blasting and baking finish to produce an elegant and pleasing outline with such advantages as smooth and reliable slewing, speedy discharge,low surplus rate,handy operation,and long using life.