The invention relates to an interstitial cell for bidirectional connection of spatial cell robots. The interstitial cell for bidirectional connection of spatial cell robots consists of a servo motor,an L-shaped plate, a supporting plate, a transmission shaft, a cam, an incomplete bevel gear, a cross-shaped guide track, a sliding block, a guide track strut, a groove bevel gear, cover plates, a setscrew, connecting surfaces and bosses. The servo motor is a source power device of the interstitial cell, the electrifying phase sequence can be changed, and power for connection and disconnection ofcells is provided; the cam is in contact with the surface of the cross-shaped guide track, the sliding block is connected with the guide track strut to form a guide track assembly, the cam rotates, the cross-shaped guide track can be driven to move forwards, and meanwhile, the guide track assembly is driven to move linearly. The guide track strut is always tangential to a sinusoidal groove in thegroove bevel gear, and by rotation of the groove bevel gear, the guide track assembly can be driven to move in the radial direction. Two connecting mechanisms are fixedly connected through the set screw and the supporting plate to form a hexahedron structure of the interstitial cell. The connecting surfaces are connected with the cover plates through the bosses so as to jointly form a connectingsurface mechanism of the interstitial cell.