Parallel locating tool for parallel guide rails

The invention discloses a parallel locating tool for parallel guide rails. The parallel locating tool comprises a fixing block, wherein a clamping groove buckled to a left guide rail is formed in thelower end of the fixing block, a longitudinal beam is arranged at the upper end of the fixing block, a cross beam and an assembling rod are arranged at the outer side of the longitudinal beam, a firstadjusting plate and a second adjusting plate are arranged on the assembling rod in a sleeving mode, a left clamping plate is arranged at the lower end of the first adjusting plate, a right clamping plate is arranged at the lower end of the second adjusting plate, and the left clamping plate and the right clamping plate form a clamping groove used for clamping and locating a right guide rail. According to the parallel locating tool, the clamping groove in the lower end of the fixing block is clamped to the installed left guide rail, so that the left guide rail and the locating tool are assembled; and the parallel dista