The invention discloses a method for producing and collecting ganoderma spore powder by field earth covering and bagging culture. The method comprises the following steps of: A1, crushing raw materials, namely collecting miscellaneous trees and crushing the collected miscellaneous trees into grains with the diameter of between 0.6 and 1cm for later use; A2, making bacteria bags, namely weighing miscellaneous tree sawdust; sufficiently prewetting the miscellaneous tree sawdust for 12 hours by spraying water; weighing bran, dipotassium phosphate and gypsum; adding the bran, the dipotassium phosphate and the gypsum into the preset miscellaneous tree sawdust; mixing uniformly and stacking for 2 to 3 hours; adjusting the water content of a culture material to be about 65 percent and adjusting the pH of the culture material to be natural; bagging manually or mechanically; and sterilizing by using a sterilization stove under normal pressure; A3, inoculating and growing bacteria, namely after cooling sterilized material bags to the temperature of about 30DEG C, moving the material bags into an inoculation room for inoculating; performing bacteria growing culture on the inoculated material bags; and entering a ganoderma growing management stage when mycelium grows all over the material bags; A4, preparing and covering soil; A5, filming and growing ganoderma; A6, enclosing films along furrows; A7, capping films; and A8, controlling moisture and collecting powder.