The invention discloses an agricultural spraying and irrigating device with good mixing effects. The agricultural spraying and irrigating device comprises a support seat. A first support frame is connected with the middle of the upper end of the support seat, a driving shaft is connected with the middle of the first support frame, a driving gear is connected with the middle of the front end of the driving shaft, gear tooth groups are uniformly connected with the outer side of the driving gear, a driving belt pulley is connected with the middle of the driving shaft and is positioned at the front end of the driving gear, a first rack meshes with the lower end of the driving gear, limiting stoppers are connected with the middles of two ends of the first rack, a fixing shaft is connected with the right end of the first rack, a fixing barrier is connected with the right end of the fixing shaft, a second rack is connected with the right end of the fixing barrier, a stirring gear is connected with the front end of the middle of the second rack, a third support frame is connected with the right side of the upper end of the support seat, a stirring tank is connected with the upper end of the third support frame, a driven shaft is connected with the middle of a fourth support frame, and a driven belt pulley is connected with the front end of the middle of the driven shaft. The agricultural spraying and irrigating device has the advantages that the agricultural spraying and irrigating device not only has spraying functions, but also has irrigating functions, and the good mixing effects can be realized by the agricultural spraying and irrigating device.