The invention discloses an oil well wellhead no-shutdown replacing procedure device. A no-shutdown connecting device comprises a shell and a reversing five-way valve; a left outer port and a left inner port which are concentric are formed in the left side of the shell, and a right inner port and a right outer port which are concentric are formed in the right side of the shell; the reversing five-way valve comprises an upper three-way valve and a lower two-way valve, the upper three-way valve and the lower two-way valve use a valve rod together, and the upper three-way valve and the lower two-way valve are arranged in the shell; the upper three-way valve comprises an upper three-way inlet, an upper three-way first outlet and an upper three-way second outlet; the lower two-way valve comprises a lower two-way inlet and a lower two-way outlet; the upper three-way inlet is connected with the left inner port, the upper three-way first outlet is connected with the right inner port, the upperthree-way second outlet communicates with an inner cavity of the shell, the lower two-way inlet communicates with the right outer port, the lower two-way outlet communicates with the inner cavity of the shell; and the inner cavity of the shell communicates with the left outer port and the right outer port at the same time. According to the oil well wellhead non-shutdown replacing procedure device,no-shutdown rapid connection with standard production and hot-oil circulating equipment are achieved.