The utility model relates to a laboratory glassware, concretely relates to emulsified asphalt after improvement grinds machine, it installs the diaphragm adjusting device in the motor top including installing the motor on the base, installs the feeder hopper in diaphragm adjusting device top, the discharging pipe is connected to motor one side, and the opposite side passes through the transmission line and connects the regulation and control device, be equipped with heating device in the hopper, be equipped with shift knob, timing device, temperature control device, heating control switch on the regulation and control device, heating device connects adjusting device, temperature control device passes through heating control switch regulation and control heating device. The utility model discloses a heating device and temperature control device in the feeder hopper can realize making things convenient for testing personnel to operate to the preheating of feeder hopper and discharging pipe more conveniently, in addition, through temperature control device can so that in the feeder hopper emulsified asphalt temperature can control within the standard requires, can also pass through timing device, set for the operating time of instrument, can cut the milling time by the accurate control.