The invention relates to an improved belt-type concentration squeezing filtering machine, which comprises a belt-type concentration section, a filter pressing section, a filter cloth deviation-correcting device, a filter cloth cleaning device, a filter cloth tension device, a reducing motor (2) and an electric control box (3), wherein the belt-type concentration section comprises a feed pipe (1), a water inlet pipe (18), a blow-off pipe (19), a drain pipe (20), a strap shaped filter cloth (4), a tension roller (5), a deviation roller (6), a deviation cylinder (7) and a driving roller (8); the filter pressing section comprises the strap shaped filter cloth (4), tension cylinders (9), the tension roller (5), a squeeze roller (10), the deviation roller (6), a spray pipe (11), the water inlet pipe (18), the deviation cylinder (7) and a dehydration roller (12); and a sliding shaft (13) is connected between the front and the back tension cylinders (9) of the filter pressing section, the spray pipe (11) is arranged beside the dehydration roller (12) on the lower part of the front section of the filter pressing section, and a reverse water-spraying water skip (14) is added below the spray pipe (11). Through the improvements, the improved belt-type concentration squeezing filtering machine greatly reduces the damage times of the strap shaped filter cloth, and the entire machine is more convenient to operate so that the pollution discharging effect of the entire machine is better.