Sliding resistor resistance value adjusting mechanism

The utility model relates to the technical field of rheostats, in particular to a sliding resistor resistance value adjusting mechanism which comprises a fixing plate and a fixing block, a fixing metal plate is installed on the surface of the fixing plate through bolts, a sliding rod is installed on the upper portion of the fixing metal plate, and a resistance wire is installed on the lower portion of the fixing metal plate. Limiting devices are installed at the two ends of the resistance wire, the two sides of the sliding rod penetrate through the fixing metal plate to be provided with connectors, a fixing block is installed on the outer side of the sliding rod, and a rotary button is installed at the top of the fixing block. According to the slide rheostat, the limiting devices are additionally arranged at the two ends of the resistance wire, so that the contact pieces of the slide rheostat can be directly blocked by the limiting devices when sliding to the two sides of the resistance wire, the contact piec