A dry
extrusion wall-breaking method for
pollen comprises the following steps of: (1) soaking
pollen in pure water for 30 minutes and filtering the
pollen to remove dust and impurities; (2) adding the pollen obtained in step (1) into a food screw extruder to extrude the pollen at a cavity temperature of between 40 and 65 DEG C, a pressure of between 2 and 12 MPa, a rotation speed of 14 to 60 R / minpollen obtained in step (1) into a food screw extruder to extrude the pollen at a cavity temperature of between 40 and 65 DEG C, a pressure of between 2 and 12 MPa, a rotation speed of 14 to 60 R / minand a
stroke of 80 to 150 centimeters, and injecting out the pollen at a high speed from a die opening with a 2 to 6
millimeter diameter for wall breaking; and (3)
drying the pollen for 1 to 2 hoursunder reduced pressure and filling the pollen in bags for
package to obtain the product. The pollen can be pure pollen or a mixture of any several kinds of the pollen. The pollen is selected from hawthorn pollen,
rape pollen, thyme pollen, buckwheat pollen, silymarin pollen, chestnut pollen, chrysanthemum pollen, orange pollen,
dandelion pollen,
tilia europea,
pine pollen,
acacia pollen, maize polhorn pollen,
rape pollen, thyme pollen, buckwheat pollen, silymarin pollen, chestnut pollen, chrysanthemum pollen, orange pollen,
dandelion pollen,
tilia europea,
pine pollen,
acacia pollen, maize pollen,
sunflower pollen,
astragalus sinicus pollen and the like. The
pollen wall-breaking efficiency of the method is up to 99 percent. The
sanitation, safety and stability of the pollen product are improved. The method is simple in process, can be operated continuously and is high in yield.