The mondial literature convincingly demonstrates that the only effective treatment for HD is surgery, whose concept is the resection of the affected aganglion segment and the secondary modified suprastenotic segment with restoring of integrity and continuity of the digestive tract. Thus, during the radical surgical treatment for HD, we have to amputate the rectal ampulla, which is manifested in post-op by functional disabilities, such as changes in the frequency of defecation, the volume of the fecal bowl, capability of fecal continence, overpassing of them is the basic goal of rehabilitation. Biofeedback therapy is an effective curative method meant to restore the conditioned-reflective links of the defecation acts. We have experience in rehabilitation of 51 children operated for HD, using an individualized program of biofeedbacktherapy (BFT). BFT is aimed at progressive and correct functional reeducation of defecation act, the improvement of the sensuous sensibility of the neorectum, the synchronization of conscious activity of anal sphincter, pelvic floor muscles and abdominal wall. The curative effectiveness was assessed by the multimodal neurofunctional examination: anorect manometry, profilometry of anal canal, ampulotonometry, electromyography (EMG) of the external anal sphincter muscle (mSAE). Functional outcomes have a direct correlation between the time since the surgery and the rehab therapy performed systematically. The improvement of the manometric results is confirmed by appearance of a positive recto-anal reflex of inhibition. The increase of anal resting pressure from 30-40 to 60-80 mmHg, vector reconstruction shows us that length of the anal canal is about 2-2.5 cm and a gap of 10-15 mmHg on one of the channels. Ampulotonometry reflects the uptake of the reservoir function of the descendented bowel loop, with initial volume 50-70 cm3 increasing to 100-140 cm3. biomechanics of the defecation acts are also examined, which along with the neorectal volume improves the time from a multi-momentary expulsion, to one in 2 times - 15-25 seconds. EMG of SAE in most of cases shows a reduced bioelectric activity immediately postoperatively and following the rehab cycles the recovery of it at normoton level. Dynamic monitoring of children treated using BFT shows an amelioration of long-term results in 94.1% of ca «BIMCO JOURNAL» Abstract book of the congress BIMCO, 2023 92 Functional recovery of these patients should not be limited in time and must continue until complete liquidation of pelvic disorder.