Recycling method applying, to thermoplastic filaments mixed with undesirable materials, the recycling method comprising successively: - a feed step during which the thermoplastic filaments and the undesirable materials are deposited in packets on a horizontal conveyor belt, - a spreading step during which the thermoplastic filaments and the undesirable materials are spread horizontally so as to form a layer, - a horizontal cutting step during which the layer of thermoplastic filaments and undesirable materials is levelled in a direction parallel to the conveyor belt, - a first cutting step during which the layer of thermoplastic filaments and undesirable materials is cut in a first vertical direction, forming portions; - a second cutting step during which the portions of layers of thermoplastic filaments and undesirable materials are cut in a second vertical direction orthogonal to the first vertical direction, - a first aspiration step during which the thermoplastic filaments and the undesirable materials thus cut are aspirated upwards, - a tearing step during which the thermoplastic filaments and undesirable materials thus aspirated are torn, - a beating step during which the thermoplastic filaments and the undesirable materials thus torn are beaten, - a preliminary grinding step during which the thermoplastic filaments and the undesirable materials thus beaten are ground in the form of fibrils of 12 to 15 mm, - an agglomeration step during which the thermoplastic filaments and the undesirable materials thus ground are compacted in the form of thermoplastic agglomerates, while the undesirable materials and a small part of the non-agglomerated thermoplastic fibrils mix and form fines, - a grinding step during which the thermoplastic agglomerates and the fines are ground so as to make the size of the agglomerates uniform at approximately 12 mm, - a separation step during which the thermoplastic agglomerates and the fines thus ground and made uniform are separated by gravimetry, and - a recovery step during which the thermoplastic agglomerates thus separated from the fines are recovered and constitute the recycled thermoplastic. - a feed step during which the thermoplastic filaments and the undesirable materials are deposited in packets on a horizontal conveyor belt, - a spreading step during which the thermoplastic filaments and the undesirable materials are spread horizontally so as to form a layer, - a horizontal cutting step during which the layer of thermoplastic filaments and undesirable materials is levelled in a direction parallel to the conveyor belt, - a first cutting step during which the layer of thermoplastic filaments and undesirable materials is cut in a first vertical direction, forming portions; - a second cutting step during which the portions of layers of thermoplastic filaments and undesirable materials are cut in a second vertical direction orthogonal to the first vertical direction, - a first aspiration step during which the thermoplastic filaments and the undesirable materials thus cut are aspirated upwards, - a tearing step during which the thermoplastic filaments and undesirable materials thus aspirated are torn, - a beating step during which the thermoplastic filaments and the undesirable materials thus torn are beaten, - a preliminary grinding step during which the thermoplastic filaments and the undesirable materials thus beaten are ground in the form of fibrils of 12 to 15 mm, - an agglomeration step during which the thermoplastic filaments and the undesirable materials thus ground are compacted in the form of thermoplastic agglomerates, while the undesirable materials and a small part of the non-agglomerated thermoplastic fibrils mix and form fines, - a grinding step during which the thermoplastic agglomerates and the fines are ground so as to make the size of the agglomerates uniform at approximately 12 mm, - a separation step during which the thermoplastic agglomerates and the fines thus ground and made uniform are separated by gravimetry, and - a recovery step during which the thermoplastic agglomerates thus separated from the fines are recovered and constitute the recycled thermoplastic.