Lifting mounting frame with good stability

The utility model relates to the technical field of mounting racks, and discloses a lifting mounting rack with good stability, which comprises a base, four symmetrically distributed trundles are fixedly mounted at the bottom of the base, two symmetrically distributed support rods are fixedly mounted at the top of the base, a fixing plate is movably mounted outside the support rods, and a lifting plate is mounted on the fixing plate. Through holes located in the same straight line are formed in the fixing plate and the supporting rod, plug pins extending to the outside are movably installed in the through holes, two symmetrically-distributed lifting assemblies are fixedly installed at the top of the base, and a lifting platform is fixedly installed at the tops of the lifting assemblies. A protective fence is fixedly installed at the top of the lifting platform, an extension ladder is fixedly installed on one side of the lifting platform, and the ladder stand has the advantages that in the using process, the st