The invention provides a mechanical leakage-free multi-way valve, and solves the problems that pressure oil on existing agricultural machinery cannot be stored, the oil leaks, and the pressure is notstable. The mechanical leakage-free multi-way valve comprises a valve body and a valve rod, wherein an oil inlet, an oil outlet, a first working port, a second working port and a cavity are formed inthe valve body; a one-way valve with a hydraulic lock function is arranged in the valve body, and is arranged between the cavity and the second working port; the valve rod has a first position, a second position and a third position; when the valve rod is located at the first position, the pressure oil of the oil inlet communicates with the second working port via the cavity and the one-way valve,and meanwhile, the first working port communicates with the oil outlet; when the valve rod is located at the second position, the oil inlet communicates with the oil outlet, and the pressure oil of the second working port is locked by the one-way valve; and when the valve rod is located at the third position, the one-way valve is opened to allow the second working port to communicate with the oiloutlet. The mechanical leakage-free multi-way valve further has the advantages of simple structure, convenience in assembly, reliable action, long service life and the like.