The invention discloses a mortar detection method for concrete bleeding, which solves the problems of time consumption, labor wasting, poor pertinence and difficult fault finding of the conventional concrete mixture-based concrete bleeding detection. The mortar detection method for concrete bleeding comprises the following steps of: (1) determining mixing proportion of C30 concrete with a large using amount as a reference mixing proportion; (2) stirring, namely pouring water into an additive-containing container, adding mixed solution of water and an additive into a stirring boiler, pouring auniformly-stirred gelled material and the mixture of sand and broken stone into the stirring boiler, putting the stirring boiler on a fixing frame, raising the stirring boiler to a fixed position forstirring, pouring the stirred material into a bucket, covering the bucket and standing under normal pressure; and (3) judging bleeding. By the method, the bleeding factors of concrete can be quickly,conveniently and correctly determined, and a foundation for providing a solution for solving concrete bleeding is laid; and the method has a wide application range.