The invention discloses a connecting supporting positioning part, a use method, a steel wire mesh frame heat retaining plate and a composite wall. The connecting supporting positioning part comprise afirst supporting part, a second supporting part and a connector, first limit clamping parts are arranged on two ends of the first supporting part, second limit clamping parts are arranged on two endsof the second supporting part, two ends of the connector are connected with the first supporting part and the second supporting part, a first left limit plane and a first right limit plane are used for limiting the distance between a middle construction layer and a left construction layer, and a second left limit plane and a second right limit plane are used for limiting the distance between themiddle construction layer and a right construction layer. Compared with a heat retaining composite plate in the prior art, the plate is simple in structure, easy to mount and convenient in construction process, the heat retaining layer and a steel wire mesh frame are constructed, a foundation structure of a heat retaining wall is formed, coating of surface protection is omitted, the composite wallis directly formed by cast-in-place concrete, strength and bonding degree of the composite wall are greatly improved, the distance between construction layers is easily controlled, and the heat retaining plate is accurately positioned.