With the innovation and development of the internal combustion engine technology, the filter requirements become increasingly high, especially for large flow oil filter. Some new requirements are introduced based on original standard such as resistance high pressure drop, loop test (heat) and other test items. A large flow oil filter integrated testing system was developed, then all kinds of performance and reliability projects of oil filter could be made expediently,the problems that the pollution concentration should be high and steady, the test oil viscosity should be vary in wide range etc were solved. This system not only can meet the CRCC certification requirements, but also can meet the largescale commercial vehicles, construction machinery filter testing requirements.