Engine lubricating oil pressure testing device and testing method thereof

The invention relates to an engine lubricating oil pressure testing device and a testing method thereof. The engine lubricating oil pressure testing device comprises an air pump, wherein the front end of the air pump is provided with a fine-tuning hand wheel, the front end of the upper part of the air pump is provided with a lifting handle, the upper end of the upper part of the air pump is provided with a pressurizing handle, and the front end of the lifting handle is provided with a stop valve; the left side of the air pump is provided with a quick connector, and the upper end of the quick connector is provided with a pressure gauge; the right side of the air pump is provided with a pressure and vacuum reversing handle and a pressure relief valve, the rear part of the right side of the air pump is provided with a safety valve, the rear side is connected with an air guide hose, and the rear end of the air guide hose is connected with an air filter; and the upper end of the air filter is connected with an air