The invention provides a resource evaluation model based on drainage basin environmental factors, and relates to the field of drainage basin environmental factors. The resource evaluation model basedon the drainage basin environment factors comprises a reaction tank, wherein a preliminary detection tank is arranged on one side of the reaction tank. According to the resource evaluation model basedon the drainage basin environment factors, through the cooperation of the reaction tank, the primary detection tank and a detection evaluation instrument arranged in a matched mode, after the reaction tank is placed in a river, water flow in the river flows into a liquid guide pipe along a filtering funnel, water in the liquid guide pipe flows into a stirring tank through a first flow discharge hole, the stirring tack stirs the water flow and limits the water flow, the water flow is prevented from flowing into the preliminary detection tank through the first flow discharge hole, a detection module in the preliminary detection tank can preliminarily detect the water in the preliminary detection tank, the detection module transmits a detection result to the detection evaluation instrument for evaluation, and water in the preliminary detection tank flows into the detection evaluation instrument for sampling.