The utility model provides a read write line fixed establishment on line or engine tray is put into production in installation, including being used for the installation to put the support frame on line or the engine tray into production, the last surface mounting of this support frame has the fixed plate, and the support frame includes curb plate, diaphragm, and the lower surface at the diaphragm is installed to the curb plate, division is equipped with at least one bar shaped mounting hole on curb plate, diaphragm, the fixed plate respectively, and the fixed plate passes through bar shaped mounting hole and retaining member demountable installation and at the upper surface of diaphragm, offers the locating hole that the several is used for installing the read write line on diaphragm, the fixed plate. The utility model discloses nimble adjustment is carried out to the mounted position of read write line to the realization, has avoided the read write line to suffer the collision when the tray moves, realizes control and the management of production quantity with circulation speed.