The invention discloses a method for measuring rice field profile soil bulk densities rapidly, simply and conveniently. The method comprises the particular steps that a soil auger is vertically driven into rice field soil, and when the acquisition soil profile depth is D, the soil auger is driven to a position of a same depth D cm; n layers are divided to take soil samples according to research requirements after the soil samples are taken out, and corresponding depths of the layers are 0-D/n, D/n-2D/n, 2D/n-3D/n, 3D/n-4D/n,... (n-1) D/n D. The taken soil samples are dried and weighed and the weighed soil samples are divided by corresponding volumes respectively to obtain soil bulk densities of corresponding soil layers. According to the method for measuring rice field profile soil bulk densities rapidly, simply and conveniently, the rice field profile soil bulk densities can be measured rapidly, simply and conveniently; soil depths can be adjusted according to requirements to measure soil bulk densities; and limits of fixed depths of cutting rings or the taking of intermediate depths merely to represent soil bulk densities of certain layer depths are broken through. Compared with traditional methods which use cutting rings to dig profiles to measure field profile soil bulk densities, the sampling related ground surface soil area is small, disturbed soil layers are small, and the labor force is saved for more than 400%.