The country's 25 leading excavator makers sold 13,408 units in September, up 27.7 percent year on year, compared with a 33-percent increase in August.
In breakdown, 11,702 excavators were sold in the domestic market, up 22.9 percent year on year. Exports of the equipment rose 74.8 percent to 1,689 units.
A total of 156,242 excavators were sold in the Jan.-Sept. period, up 53.3 percent on the same period last year. More than 140,000 of those were sold domestically.
Sales of excavators are usually backed by growth in mining, construction, and infrastructure investment.
Fixed-asset investment growth in China slowed to 5.3 percent for January-August from 5.5 percent in the first seven months of the year, weighed down by weakening infrastructure investment, according to the National Bureau of Statistics.