The invention discloses a cleaning method for a waste packing bucket. The cleaning method comprises the following steps that (1) cleaning is conducted, specifically, residual liquid in the bucket is sucked out through a suction pump, and residual liquid adhering to the interior of the packing bucket is removed; (2) solvent cleaning is conducted, specifically, cleaning fluid is poured into the packing bucket and cooperates with a rolling cleaning machine for automatic rotation sealed cleaning, the volume of the cleaning fluid accounts for 0.1-1% of the volume of the interior of the waste packing bucket, and cleaning is conducted two or three times; (3) pressurizing shaping is conducted, specifically, the cleaned packing bucket is subjected to air inflation shaping through an air compressor,and the effect that the shape of the packing bucket is integral is ensured; and (4) painting and airing are conducted, specifically, the integral packing bucket is subjected to painting and airing treatment. The cleaning method for the waste packing bucket is simple in technology and suitable for cleaning of various small-size packing buckets, through cleaning with multiple solutions, the original structure of the packing bucket is maintained, the machining cost is reduced, air environment pollution is reduced, and the good economic benefits and social benefits are achieved.