Disclosed is a sensor locating device for a forklift exhaust silencer insertion loss test. The sensor locating device for the forklift exhaust silencer insertion loss test comprises a cross-shaped support and a magnetism base. The cross-shaped support comprises a vertical rod, a transverse rod, an oscillating rod, a sensor clamping base and a base plate. The vertical rod and the transverse rod arein a long strip shape, sliding grooves are formed in the middles of the vertical rod and the transverse rod in the length direction, an adjusting bolt, a gasket and a locking nut are arranged on thevertical rod, and the vertical rod and the transverse rod are connected together to form a cross through the adjusting bolt, the gasket and the locking nut. The base plate is arranged at the lower endof the vertical rod and connected with the plane of the upper side of the magnetism base. The end portion of one end of the transverse rod is connected with one end of the oscillating rod, the otherend of the oscillating rod is connected with the sensor clamping base, and a sensor is connected to the sensor clamping base. When the sensor locating device for the forklift exhaust silencer insertion loss test is used, the magnetism base is attracted to the upper side of a tail pipe transfer pipe, and the positions and the directions of the vertical rod, the transverse rod and the oscillating rod are adjusted, so that locating of the sensor is achieved. The sensor locating device for the forklift exhaust silencer insertion loss test is high in locating efficiency and convenient to assemble and disassemble.