In order to perform automatic, rapid and accurate measurement to the crankshaft，an engine crankshaft integrated parameter measuring instrument was designed. The measurement requirements of crankshaft, the composition scheme and measuring principle of the measuring system were introduced. The hardware of the measurement system was designed and selected. The function of each module and the running process of the measuring system were introduced. The main causes of system error were analyzed. The least square method was used to deal with the data, so the measurement error was reduced. The system has been put into use. The fast, efficient and accurate automatic measurement of crankshaft parameters is realized.