The high efficient cement grouting pump should have a large discharge volume adjustment range. Generally, the change between the final grouting amount and the initial grouting amount is 8-10 times. The final grouting volume is small, which proves that the filling and compaction is good. The grouting pump should have reliable pressure control capabilities. Because the grouting “filling and compacting” is bound to cause overpressure of the grouting pump, the pump should reduce the slurry discharge in time to reduce the flow resistance of the slurry in the gap, so as to avoid grouting and fracturing and road bump , Mechanical accidents, etc. The grouting pump preferably has the performance of automatically adjusting the discharge amount as the grouting pressure changes.