In order to study the feasibility of predicting the performance of fresh mixed concrete by the current signal during the concrete mixing process, this paper studies the corresponding current signal characteristics of the concrete mixing process and the influence law of concrete grades, dilute density state, mixing quantity and mixer state on the current signal. The results show that with the increase of the concrete number, the peak current, stable current and time increase accordingly. The dilute density state of concrete mainly affects the average gradient of the mixing stage of the current signal, that is, the drier and thicker the concrete, the greater the absolute value of the average gradient; The increase of mixing quantity will lead to the increase of peak current and stable current and presents a linear relationship; The state of the mixer mainly affects the magnitude of the no-load current.