Intermediate relay circulation control circuit

The utility model discloses an intermediate relay circulation control circuit, which comprises a circulation control circuit for realizing an alternate circulatory work mode. The circulation control circuit connected with a work circuit includes a first intermediate relay (K1), a second intermediate relay (K2), a third intermediate relay (K3) and a fourth intermediate relay (K4), wherein the first intermediate relay (K1), the second intermediate relay (K2) and the third intermediate relay (K3) are connected onto the circulation control circuit in series connection, and the fourth intermediate relay (K4) is connected onto a connecting line of the third intermediate relay (K3) in parallel. The intermediate relay circulation control circuit is simple in structure and convenient in installation and connection, replaces a circulation work relay by connecting a plurality of intermediate relays of different sizes into an original circulation control circuit, accordingly realizes the alternate circulatory work mode o