Method for washing laundry in a laundry washing machine of the type comprising: - a washing tub external to a rotatable washing drum adapted to receive laundry; - a water supply circuit to supply water into said washing tub; - a washing product supplier to supply a detergent into said washing tub; the method for washing laundry comprising the following phases: a) a laundry wetting phase which comprises the introduction of water and detergent into said washing tub and the supplying of said water and detergent to laundry contained in said washing tub; b) a main washing phase during which said washing drum is rotated at a first rotation speed to exert a mechanical washing action on the laundry contained in said washing tub; c) an intermediated draining phase during which said washing drum is rotated at a second rotation speed, higher than said first rotation speed, causing the extraction from said laundry of at least part of a solution of water and detergent therein contained, which is drained off said washing tub; d) a rinsing phase comprising the introduction of water into said washing tub and the rotation of said washing drum at a third rotation speed; e) a final draining phase during which said washing drum is rotated at a fourth rotation speed, higher than said third rotation speed, causing the extraction from said laundry of at least part of the liquid therein contained, which is drained off said washing tub, characterized in that it comprises, between said main washing phase b) and said intermediated draining phase c), a foam prevention phase b1) during which the formation of foam during the following intermediated draining phase c) is hindered, wherein said foam prevention phase b1) is performed even if foam is not present in said washing tub and comprises the following step: b1_a) a dilution step in which a first quantity of clean water is loaded into said washing tub to reduce the detergent concentration in said washing tub, wherein during said dilution step b1_a) said washing drum is rotated at a fifth rotation speed, lower than said second and forth rotating speeds, in order to increase the clean water absorption of the laundry, dilute possible foam and reduce new foam creation. - a washing tub external to a rotatable washing drum adapted to receive laundry; - a water supply circuit to supply water into said washing tub; - a washing product supplier to supply a detergent into said washing tub; the method for washing laundry comprising the following phases: a) a laundry wetting phase which comprises the introduction of water and detergent into said washing tub and the supplying of said water and detergent to laundry contained in said washing tub; b) a main washing phase during which said washing drum is rotated at a first rotation speed to exert a mechanical washing action on the laundry contained in said washing tub; c) an intermediated draining phase during which said washing drum is rotated at a second rotation speed, higher than said first rotation speed, causing the extraction from said laundry of at least part of a solution of water and detergent therein contained, which is drained off said washing tub; d) a rinsing phase comprising the introduction of water into said washing tub and the rotation of said washing drum at a third rotation speed; e) a final draining phase during which said washing drum is rotated at a fourth rotation speed, higher than said third rotation speed, causing the extraction from said laundry of at least part of the liquid therein contained, which is drained off said washing tub, a) a laundry wetting phase which comprises the introduction of water and detergent into said washing tub and the supplying of said water and detergent to laundry contained in said washing tub; b) a main washing phase during which said washing drum is rotated at a first rotation speed to exert a mechanical washing action on the laundry contained in said washing tub; c) an intermediated draining phase during which said washing drum is rotated at a second rotation speed, higher than said first rotation speed, causing the extraction from said laundry of at least part of a solution of water and detergent therein contained, which is drained off said washing tub; d) a rinsing phase comprising the introduction of water into said washing tub and the rotation of said washing drum at a third rotation speed; e) a final draining phase during which said washing drum is rotated at a fourth rotation speed, higher than said third rotation speed, causing the extraction from said laundry of at least part of the liquid therein contained, which is drained off said washing tub,