Abstract: After being imported and used 10 odds years, HQ 1400 fracturing pump has appeared a series of problems, such as the wreck and invalidation of the common parts at the power end. Based on the Reverse Engineering Technology, particula study, CAD modeling, material analysis, finite element analysis and research, the new 1400 fracturing pump is designed as five cylinder, singleaction, reciprocating type, slidercrank mechanism and overtype worm gear at last. A new 1400 Fracturing Pump is successfully developed through systemical theory study and structure analysis of HQ 1400 Fracturing Pump. This paper offers a kind of effective method to study other similar products.

Key words: fracturing pump, power end, reverse engineering, theory study, structure design