S pipe distribution valve and concrete pumping device

The invention provides an S-pipe distribution valve and a concrete pumping device.The S-pipe distribution valve comprises a first butt-joint pipe, a middle connecting pipe and a second butt-joint pipe which are sequentially connected, the first butt-joint pipe comprises a first pipe cavity, a first upper shell and a first lower shell, the first upper shell and the first lower shell are divided by the axial section of a pipeline, and the first pipe cavity comprises a first upper pipe groove and a first lower pipe groove; the first upper pipe groove is provided with a semicircular first upper pipe groove cross section, the first lower pipe groove is provided with a semi-oval first lower pipe groove cross section, the groove opening width direction of the first lower pipe groove is the short axis direction of the semi-oval, and the groove depth direction of the first lower pipe groove is the long half axis direction of the semi-oval. The cross section of the first lower pipe groove is arranged to be in a semi-ov