The invention discloses a grinding device for construction adhesion mortar rubber powder. The grinding device comprises a base, a first fixing plate, a storage shell, a second fixing plate, a motor, arotating shaft, a filter net barrel, a sliding groove, a fixing ring, a storage barrel, a discharging barrel, a discharging valve, a stop cover, a feeding shell, a grinding shaft, a grinding roller,a connection plate and a connection base. The grinding device for the construction adhesion mortar rubber powder is simple in structure, novel in design and capable of conveniently grinding smashed rubber products and discharging ground qualified rubber powder granules in time, improves the rubber powder grinding efficiency, meanwhile improves the quality of the ground rubber powder granules, facilitates use of construction adhesion, can conveniently discharge ground qualified rubber powder granules in order in time and conveniently store discharged rubber powder granules, brings convenience to workers for collection treatment, greatly reduces the workload of the workers, and is high in practical value and suitable for being used and popularized.