Abstract: In the high concentration tailings pulp pipeline transportation with long distance，large flow，reciprocating diaphragm pump is the key equipment，and its pumping power calculation is particularly important.At present，there are many factors affecting the calculation of pumping power，and the calculation method is complex，which leads to the difficulty of the section of pump scheme.Diaphragm pump power calculate method is simplified，and convenience in support of equipment preselection is provided.Based on huge amounts of the SGMB and DGMB power data collected from industrial transportation of tailings paste pulp，chemistry pulp，coal water mixture pulp and aluminum oxide pulp，using relevant mathematical software to process fitting analysis between diaphragm pump power rating，flow rating and pressure of different type and transportation object to figure out its obscure correlation，a concise power formula is obtained.Research results indicates，the product of rating flow and pressure is in a certain range，diaphragm pump application type and transportation object does almost no influence on the power formula，thus，the similar diaphragm pump power equation can be uniformed.  

Key words: Diaphragm pump, Pumping power, Empirical formula, Fitting analysis