The invention discloses a walking agricultural irrigation device. The walking agricultural irrigation device comprises a water tank, a support platform, a support base, a travelling wheel, a rotary wheel, a support top plate, a support framework, a U-shaped bracket, a sliding rod, a toothed plate, an annular gear and a swinging water pipe. A sliding rod is erected on the upper surface of the support top plate in a sliding mode, the middle of the sliding rod is provided with a guide column, a support rod is fixedly installed on the rotary wheel, a sliding block is rotationally erected at the end of the support rod, an articulated shaft is fixedly welded to the bottom of a motor mounting rack, the end portion of the articulated shaft is rotationally connected with a deflector rod, the bottom end of the support framework is fixedly connected with the top end of the deflector rod, the sliding block is arranged in a sliding cavity of the support framework in a sliding mode, and the U-shaped bracket is fixedly installed at the top end of the support framework and is arranged on the guide column in a sleeving mode. The walking agricultural irrigation device has the advantages of being simple in structure, convenient to use, convenient to operate, good in irrigation effect, high in efficiency and suitable for usage and promotion, sprayed clear water can evenly cover crops, and the crop growth is promoted.