The invention discloses a
straw smashing and returning device for agricultural planting. The
straw smashing and returning device comprises a base plate, a smashing chamber is fixedly installed in the middle of the top of the base plate, a smashing motor is fixedly installed in the smashing chamber through a support installed on the left side of the smashing chamber, a smashing shaft is fixedly installed on an output shaft of the smashing motor, one side of the smashing shaft penetrates through the left side of the smashing chamber and extends into the smashing chamber, the surface of the side, located in the smashing chamber, of the smashing shaft is sleeved with a smashing roller, smashing blades are fixedly installed on the outer surface of the smashing roller, and a discharging bin is fixedly installed in the middle of the bottom of the smashing chamber. According to the
straw smashing and returning device for agricultural planting, through cooperative use of a first rotating motor, a
cam plate, an
extrusion plate, a reset spring, a push rod, a feeding port, a pretreatment chamber, a tool apron, a sectioning tool and a
cutting plate, straw entering from the feeding port is subjected to sectioning treatment, so that the whole straw is
cut into small sections, therefore, a subsequent smashing mechanism can conveniently smash the straws, the smashing effect of the smashing mechanism on the straws is greatly improved, the smashing effect is good, and the improvement of the straw fertilization effect is facilitated.