The invention discloses a low-cost environment-friendly composite loss-control fertilizer. The preparation method for the low-cost environment-friendly composite loss-control fertilizer comprises the following steps that: fertilizer, attapulgite, polyacrylamide and poly-ferroaluminum chloride are mixed for granulation; and nitrogen, phosphor and potassium are fixed into soil. The low-cost environment-friendly composite loss-control fertilizer can reduce the loss of nitrogen element by 20 to 60 percent, reduce the loss of phosphor element by 30 to 75 percent and reduce the loss of potassium fertilizer by 25 to 70 percent. Moreover, the utilization rate of composite fertilizer is improved and the pollution of the nitrogen element and the phosphor element on water and the atmosphere is reduced.